Manuale d’uso / di manutenzione del prodotto WR450F (2011) del fabbricante Yamaha
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O WNER’S SER VICE MANU AL MANUEL D’A TELIER DU PR OPRIET AIRE F AHRER- UND W AR TUNGSHANDB UCH MANU AL DE SER VICIO DEL PR OPIET ARI O WR450F ( A ) 1HB-28199-40 PRINTED IN JAP AN 2010.
Q Read this manual carefull y bef ore operating this vehic le . This manual should sta y with this vehicle if it is sold. Q Il con vient de lire attentivement ce manuel av ant la première utilisation du véhicule. Le man uel doit étre remis avec le véhicule en cas de vente de ce dernier .
WR450F(A) WR450F(A) 2011 2011 1HB-28199-40-E0 1HB-28199-40-E0 OWNER’S SERVICE MANUAL OWNER’S SERVICE MANUAL Read this manual carefully before operating this vehicle.
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WR450F (A) OWNER'S SERVICE MANUAL ©2010 by Yamaha Motor Co., Ltd. 1st Edition, April 2010 All rights reserved. Any repr inting or unauthorized use wi thout the written permission of Yamaha Motor Co.
FOREWORD INTRODUCTION Congratul ations on y our purchas e of a Yamaha WR series. This model is the culmination of Yama ha's vast ex- perience in the production of paceset- ting racing machines. It represents the highest grade of craftsmanship and reliability that have made Yama- ha a leader.
• PROPERLY SECURE THE MA- CHINE BEFORE TRANSPORTING IT. When transporting the machine in another vehicle, alwa ys be sure it is properly secured and in an upright position and that the fuel cock is in the "OFF" position. Otherwise, fuel may leak out of the carburetor or fuel tank.
HOW TO READ DESCRIPTIONS To help identify parts and clarify pro- cedure steps, there are exploded dia - grams at the start of each removal and disassembly section. 1. An easy-to-see exploded diagram "1" is provided for removal and disassembly jobs.
TABLE OF CONTENTS GENERAL INFORMATION 1 SPECIFICATIONS 2 REGULAR INSPECTION AND ADJUSTMENTS 3 TUNING 4 ENGINE 5 CHASSIS 6 ELECTRICAL 7.
CONTENTS CHAPTER 1 GENERAL INFOR- MATION LOCATION OF IMPORTANT LABELS ..... 1-1 DESCRIPTION . ................ 1-5 CONSUMER INFORMATION................. 1-6 INCLUDED PARTS .......... 1-6 IMPORTANT INFORMATION................. 1-6 CHECKING OF CONNECTION .
1-1 LOCATION OF IMPORTANT LABELS GENERAL INFORMATION LOCATION OF IMPORTANT LABELS Please read the following importan t labels carefully before operating this vehicle.
1-2 LOCATION OF IMPORTANT LABELS EUROPE .
1-3 LOCATION OF IMPORTANT LABELS AUS, NZ, ZA.
1-4 LOCATION OF IMPORTANT LABELS Familiarize yourself w ith the following pictograms and read the explanatory text. Read Owner's servic e manual. This unit contains high-pressure nitrogen ga s. Mishandling can cause explosion. Do not incinerate, puncture or open.
1-5 DESCRIPTION DESCRIPTION • The machine you have purchased may differ slightly from th ose shown in the following. • Designs and specifications are subj ect to change without notice. 1. Clutch lever 2. Hot starter lever 3. Engine stop switch 4. Multi-function displ ay 5.
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1-7 CHECKING OF CONNECTION 3. When disassemblin g the ma- chine, keep mated pa rts together. They include gears, cylinders, pistons, and othe r mated parts that have been "mated" through normal wear. Mated parts must be reused as an assembly or re- placed.
1-8 SPECIAL TOOLS SPECIAL TOOLS The proper spec ial tools are necessa ry for complete and accura te tune-up and assembly. Using the correct special tool will help prevent damage caused by the use of improper tools or improvised techni ques . The shape and part numb er used for the special tool differ by coun try, so two types are provided.
1-9 SPECIAL TOOLS Damper rod holder YM-01494, 90890-01494 Use this tool to remove and install the damper rod. Fork seal driver YM-A0948, 90890-01502 This tool is used when install th e fork oil seal. Spoke nipple wrench YM-01521, 90980-01521 This tool is used to tighten the spoke.
1-10 SPECIAL TOOLS Valve spring compressor YM-4019, 90890-04019 This tool is needed to remove and install the valve assembl ies. Clutch holding tool YM-91042, 90890-04086 This tool is used to hold the clutch when removing or installing the clutch boss securing nut.
1-11 SPECIAL TOOLS Dynamic spark tester YM-34487 Ignition checker 90890-06754 This instrument is necessary for checking the ignition system compo- nents. Vacuum/pressure pump gaug e set YB-35956-A, 90890-06756 This tool is used to check the air in- duction system.
1-12 CONTROL FUNCTIONS CONTROL FUNCTIONS MAIN SWITCH Functions of the respective switch po- sitions are as follows: ON: The engine can be started only at this position.
1-13 MULTI-FUNCTION DISPLAY COLD STARTER KNOB When cold, the engine requires a richer air-fuel mixture for starting. A separate starter circuit, which i s con- trolled by the cold starter knob "1", supplies this mixture. Pull the cold starter knob out to open the circuit for starting.
1-14 MULTI-FUNCTION DISPLAY Changing odomet er and tripmeter A/B (TRIP A/B) 1. Push the "SLCT2" button to change the tripmeter display. The display will change in the follow- ing order: Odometer → TRIP A → TRIP B → TRIP A → Odometer.
1-15 MULTI-FUNCTION DISPLAY Auto start 1. Check that changeover has been made to RACE MODE. (Refer to "Changeover from BASIC MODE to RACE MODE".) 2. Make the machine ready for a run by pushing the "SLCT1" button for 2 seconds or more.
1-16 MULTI-FUNCTION DISPLAY FUNCTION DIAGRAM A short push on the button changes the operation in the arrowed direction. A short push on the button changes the operation in both arrowed directions. A long push on the button changes the operation in the arrowed direction.
1-17 MULTI-FUNCTION DISPLAY The following diagram illustrates th e multi-function display rega rding the direction and operation condition in- volved in each of its functions. A. A short push on the button changes the operation i n the ar- rowed direction.
1-18 STARTING AND BREAK-IN STARTING AND BREAK-IN FUEL Always use the recommended fuel as stated below. Also, be sure to use new gasoline. Use only unleaded ga soline. The use of leaded gasoline will cause severe damage to the engi ne inter- nal parts such as valv es, piston rings, and exhaust system, etc.
1-19 STARTING AND BREAK-IN The engine fails to start Pull the hot starter lever all the way out and while holding the lever, kick the kickstarter crank 10 to 20 times to clear the engine. Then, re start the en- gine. Refer to "Restarting an engine after a fall".
1-20 TORQUE-CHECK POINTS TORQUE-CHECK POINTS Concerning the tightening torque, refer to "TIGHTENING TORQUES" section in the CHAPTER 2. Frame construction Frame to rear frame Combined seat an.
1-21 CLEANING AND STORAGE CLEANING AND STORAGE CLEANING Frequent cleaning of your machine will enhance its appe arance, maintain good overall perfo rmance, and ex- tend the life of many components. 1. Before washing the machine, block off the en d of the exhau st pipe to prevent water from enter- ing.
2-1 GENERAL SPECIFICATIONS SPECIFICATIONS GENERAL SPECIFICATIONS Model name: WR450FA (USA, CDN, AUS, NZ) WR450F (EUROPE, ZA) Model code numbe r: 1HB1 (USA) 1HB2 (CDN) 1HB3 (EUROPE) 1HB4 (AUS, NZ, ZA) Dimensions: USA, CDN, ZA EUROPE AUS, NZ Overall length 2,175 mm (85.
2-2 GENERAL SPECIFICATIONS Fuel: Type Premium unleaded gasoline on ly with a re search octane number of 95 or higher. Tank capacity 8.0 L (1.76 Imp gal, 2.11 US gal) Reserve 1.1 L (0.24 Imp ga l, 0.29 US gal) Carburet or: Type FCR-MX39 Manufacturer KEIHIN Spark plug: Type/manufacturer CR8E/NGK (resistance type ) Gap 0.
2-3 MAINTENANCE SPECIFICATIONS MAINTENANCE S PECIFICATIONS ENGINE Shock absorber: Front shock absorber Coil spring/oil damper Rear shock absorber Coil spring/gas, oil damper Wheel t ravel: Front wheel travel 300 mm (11.8 in) Rear wheel travel 305 mm (12.
2-4 MAINTENANCE SPECIFICATIONS Intake "A" 3 0.100–30.200 mm (1.18 50–1.1890 in) 30.000 mm (1.1811 in) Intake "B" 2 2.450–22.550 mm (0.88 39–0.8878 in) 22.350 mm (0.8799 in) Exhaust "A" 30.200–30.300 mm (1.1890– 1.
2-5 MAINTENANCE SPECIFICATIONS "D" margin thickness (IN) 1 mm (0.0394 in) 0.85 mm (0.033 in) "D" margin thickness (EX) 1 mm (0.0394 in) 0.85 mm (0.033 in) Stem outside diameter (IN) 4.475–4.490 mm (0 .1762–0.1768 in) 4.445 mm (0.
2-6 MAINTENANCE SPECIFICATIONS Direction of winding (top view) (IN) Clockwise ---- Direction of winding (top view) (EX) Clo ckwise ---- Piston: Piston to cylinder clearance 0.020–0.04 5 mm (0.0008–0.0018 in) 0.1 mm (0.004 in) Piston size "D" 94.
2-7 MAINTENANCE SPECIFICATIONS Crankshaft: Crank width "A" 61.95–62.00 mm (2.439–2.441 in ) ---- Runout limit "C" 0.03 mm (0.0012 in) 0.05 mm (0.002 in) Big end side clearance "D" 0.15–0.45 mm (0.0059–0.0177 in) 0.
2-8 MAINTENANCE SPECIFICATIONS Carburetor: USA, CDN, AUS, NZ, ZA EUROPE I. D. mark 5TJE E0 5TJL L0 ---- Main jet (M.J) #162 #160 ---- Main air jet (M.A.J) ø2.0 ← ---- Jet needle (J.N) NFNT NNHU ---- Cutaway (C.A) 1.5 ← ---- Pilot jet (P.J) #45 #48 ---- Pilot air jet (P.
2-9 MAINTENANCE SPECIFICATIONS CHASSIS Item Sta ndard Limit Steering system: Steering bearing type Taper roller bearing ---- Front suspension: USA, CDN EUROPE, AUS, NZ, ZA Front fork travel 300 mm (11.8 in) ← ---- Fork spring free length 460 mm (18.
2-10 MAINTENANCE SPECIFICATIONS ELECTRICAL Drive chain: Type/manufacturer DID520VM/DAIDO ---- Number of links 113 links + joint ---- Chain slack 48–58 mm (1.9–2.3 in) ---- Chain length (15 links) ---- 239.3 mm (9.42 in) Front disc brake: Disc outside dia.
2-11 MAINTENANCE SPECIFICATIONS Charging system: System type AC magneto ---- Model (stator)/manufacture r 5TJ 50/YAMAHA ---- Normal output 14 V/120 W at 5,000 r/min ---- Charging coil resistance (color) 0.288–0.432 Ω at 20 °C (68 °F) (White–Ground) ---- Lighting coil resistance (color) 0.
2-12 TIGHTENING TORQUES TIGHTENING TORQUES ENGINE △ - marked portion shall be checke d for torque ti ghtening after break-in or before each race. *1: Tighten the cylinder head bo lts to 30 Nm (3.0 m•kg, 22 ft•l b) in the proper tightenin g sequence, remove and retighten the cylinder head bolts to 20 Nm (2.
2-13 TIGHTENING TORQUES Radiator pipe 1, 2 M10 × 1.0 2 10 1.0 7.2 Impeller M8 × 1.25 1 14 1.4 10 Water pump housing cover M6 × 1.0 3 10 1.0 7.2 Coolant drain bol t M6 × 1.0 1 10 1.0 7.2 Oil pump cove r M4 × 0.7 1 2 0.2 1.4 Oil pump M6 × 1.0 2 10 1.
2-14 TIGHTENING TORQUES CHASSIS △ - marked portion shall be checke d for torque ti ghtening after break-in or before each race. Part to be tightened Thread size Q'ty Tightening torque Nm m•kg ft•lb △ Upper bracket and outer tube M8 × 1.25 4 21 2.
2-15 TIGHTENING TORQUES △ Driven sprocket and wheel hub M8 × 1.25 6 50 5.0 36 △ Nipple (spoke) — 72 3 0.3 2.2 △ Disc cover and rear brake caliper M6 × 1.0 2 10 1.0 7.2 △ Protector and rear brake caliper M6 × 1.0 2 7 0.7 5.1 Chain puller adjust bolt and locknut M8 × 1.
2-16 TIGHTENING TORQUES 1. First, tighten the steering ring nut app roximately 38 Nm (3.8 m•kg, 27 ft•lb) by u sing the steering nut wrench, then loosen the steering ring nut one turn. 2. Retighten the steering ring nut 7 Nm (0.7 m•kg, 5.1 ft•lb).
2-17 TIGHTENING TORQUES GENERAL TORQUE SPECIFICA TIONS This chart specifies torque for stan- dard fasteners with standard I.S.O. pitch threads. Torque specifications for special components or assem- blies are included in the applicable sections of this book.
2-18 TIGHTENING TORQUES.
2-19 LUBRICATION DIAGRAMS LUBRICATION DIAGRAMS 1. Oil filter element 2. Oil pump 3. Drive axle 4. Main axle 5. Crankshaft 6. Connecting rod A. From cylinder B.
2-20 LUBRICATION DIAGRAMS 1. Intake camshaft 2. Exhaust camshaft A. To main axle B. From oil pump.
2-21 CABLE ROUTING DIAGRAM CABLE ROUTING DIAGRAM 1. Fuel tank breather hose 2. Clamp 3. Diode 4. Hot starter cable 5. Throttle position sensor lead 6. Wire harness 7. Hump (frame) 8. Negative battery lead 9. Starter motor lead 10. Neutral switch le ad 11.
2-22 CABLE ROUTING DIAGRAM A. Insert the end of the fuel ta nk breather hose into the hole in the steering stem. B. Fasten the throttle cable, hot starter cable and rectifier/regula - tor lead onto the frame. Locate the clamp under the throttle ca- ble on the right side of the frame, and face its ends, as well as the tie ends, dow nward.
2-23 CABLE ROUTING DIAGRAM 1. Throttle cable (pull) 2. Throttle cable (return) 3. Catch tank hose 4. Ignition coil 5. Clamp 6. Air induction hose (air cut-off valve - rear of cylinder he ad) 7. Catch tank breather hose A. Cross the pull and push throttle cables.
2-24 CABLE ROUTING DIAGRAM 1. Brake ma ster cylinder 2. Brake hose holder 3. Brake ho se A. Install the brake hose so that its pipe portion directs as shown and lightly touche s the projec- tion on the brake caliper. B. Pass the brake hose into the brake hose holders.
2-25 CABLE ROUTING DIAGRAM 1. Clamp 2. Positive battery lead 3. Battery 4. Negative battery lead 5. Taillight coupler 6. CDI unit coupler (6-pin) 7. CDI unit coupler (3-pin) 8.
2-26 CABLE ROUTING DIAGRAM A. Fasten the wire harness to the upper engine bracket (left side). Locate the clamp end facing to- ward the upper side of the frame with the tie en d cu t off on the in- side of the frame. B. Fasten the wire harness to the upper engine bracket (left side).
2-27 CABLE ROUTING DIAGRAM 1. Throttle cable 2. Clamp 3. Brake ho se 4. Clutch cable 5. Hose guide 6. Main switch coupler 7. Wire harness 8. Headlight coupler 9. Hot starter cable 10. Multi-function displ ay bracket 11. Main switch 12. Upper bracket 13.
2-28 CABLE ROUTING DIAGRAM A. Fasten the start switch lead to the handlebar with the plas tic bands. B. Fasten the engine stop switch lead and clutch switch lead to the handlebar with the plas tic bands. C. Pass the brake hose through the hose guides.
3-1 PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM (For Canada) REGULAR INSPECTION AND ADJUSTMENTS PERIODIC MAINTENANCE CHART FO R THE EMISSION CONTRO L SYSTEM (For Canada) • From 4,200 mi (7,000 km) or 9 months, repeat the maintenanc e intervals starting from 1,800 mi (3,000 km) or 3 months.
3-2 GENERAL MAINTENANCE AND LUBRICATION CHART (For Canada) GENERAL MAINTENANCE AND LUBRI CATION CHART (For Canada) No. ITEM CHECKS AND MAINTENANCE JOBS INITIAL ODOMETER READINGS 600 mi (1,000 km) or 1 month 1,800 mi (3,000 km) or 3 months 3,000 mi (5,000 km) or 6 months 1 Clutch Check operation.
3-3 MAINTENANCE INTERVALS FOR COMPETITION USE • The air filter needs more fre quent service if you are riding in unusually wet or dusty areas. • Hydraulic brake service • After disasse mbling the brake master cylinders and calipers, always change the fluid.
3-4 MAINTENANCE INTERVALS FOR COMPETITION USE VALVE LIFTERS Inspect ● Check for scratches and wear. Replace ● CAMSHAFTS Inspect the camshaft surface. Inspect ● Inspect the decompression system. Replace ● CAMSHAFT SPROCKETS Inspect ● Check for w ear on th e teeth a nd for damage.
3-5 MAINTENANCE INTERVALS FOR COMPETITION USE CRANK Inspect and clean ●● CARBURETOR Inspect, adjust and clean ●● AIR INDUCTION SYSTEM Inspect and clean ●● ●● SPARK PLUG Inspect and clean ●● Replace ● DRIVE CHAIN Use chain lube. Lubricat e, slack, ali gnment ●● Chain slack: 48–58 mm (1.
3-6 MAINTENANCE INTERVALS FOR COMPETITION USE FRONT FORKS Inspect and adjust ●● Replace oil ●● Suspension oil "S1" Replace oil seal ● FRONT FORK OIL SEAL AND DUST SEAL Clean and lu.
3-7 PRE-OPERATION INSPECTION AND MAINTENANCE PRE-OPERATION INSPECTION AND MAINTENANCE Before riding for break-in operation or practice, make sure the machine is in goo d operating condition.
3-8 ENGINE ENGINE REMOVING THE SEAT, FUEL TANK AND SIDE COVERS Order Part name Q'ty Remarks Turn the fuel cock to "OFF". Disconnect the fuel hose. 1S e a t 1 2 Air scoop (left and right) 2 3 Bolt (fuel tank) 2 4 Fuel tank 1 5 Left side cover 1 Open the air filter case cover.
3-9 ENGINE REMOVING THE SIDE COVER 1. Remove: • Bolt (side cover) • Right side cover "1" Draw the side cover backward to re- move it because its claw "a" is insert- ed in the air filter case.
3-10 ENGINE REMOVING THE EXHAUST PIPE AND SILENCER Order Part name Q'ty Remarks Right side cover Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section.
3-11 ENGINE CHECKING THE SILENCER AND EXHAUST PIPE 1. Inspect: • Gasket "1" Damage → Replace. INSTALLING THE SILENCER AND EXHAUST PIPE 1.
3-12 ENGINE Handling note s of coolant: The coolant is harmful so it should be handled with sp ecial care. • When coolant sp lashes to your eye. Thoroughly wash your eye with water and see your do ctor. • When coolant sp lashes to your clothes. Quickly wash it away with water and then with soap.
3-13 ENGINE 2. Adjust: • Throttle grip free play Throttle grip free play adjustm ent steps: a. Slide the adjuster cover. b. Loosen the locknut "1". c. Tu rn the adjuster "2" until the specified free play is obtained. d. Tighten the lockn ut.
3-14 ENGINE 5. Inspect: • Air filter element Damage → Replace. 6. Apply: • Foam-air-filter oil or equivalent oil to the el ement • Squeeze out the excess oil. Ele- ment shoul d be wet but not dr ip- ping. • Wipe off the oil left on the element surface using a clean dry cloth.
3-15 ENGINE CHANGING THE ENGINE OIL 1. Start the engine and let it warm up for several minutes. 2. Stop the engine and place an oil pan under the drain bolt.
3-16 ENGINE Using a digital engine tachometer for idle speed adjustment, detect th e en- gine idling speed by bringing the sensing element "c" of the engine ta- chometer close to the ignition coil "2".
3-17 ENGINE c. Sele ct the proper pad using the pad selecting table. The thickness "a" of each pad is indi- cated in hundredths of milli meters on the pad upper surface. d. Round off the last digit of the in- stalled pad number to the nearest increment.
3-18 ENGINE INTAKE EXHAUST MEASURED CLEARANCE INSTALLED PAD NUMBER 120 125 130 135 140 145 150 155 160 165 170 175 180 185 190 195 200 205 210 215 220 225 230 235 240 0.00 - 0.04 120 125 13 0 135 140 145 150 155 160 165 170 175 180 185 190 195 200 205 210 215 220 225 230 0.
3-19 CHASSIS CLEANING THE SPARK ARRESTER (For USA) • Be sure the exhaust p ipe and si- lencer a re cool b efore clean ing the spark arre ster. • Do not start th e engine w hen cleaning the exhaus t system. 1. Remove: • Screw (silencer cap) "1" 2.
3-20 CHASSIS 2. Remove: • Brake lever cover 3. Adjust: • Brake lever position Brake lever position adjustment steps: a. Loosen the locknut "1". b. Turn the adjusti ng bolt "2" until the lever position "a" is within speci- fied position.
3-21 CHASSIS i. Insta ll the brake caliper "8" and tighten the pad pin "9". j. Insta ll the pad pin plug "10". 3. Inspect: • Brake fluid level Refer to "CHECKING THE BRAKE FLUID LEVEL" section. 4. Check: • Brake lever operation A softy or spongy feeling → Bleed brake system.
3-22 CHASSIS 3. Inspect: • Brake fluid level Refer to "CHECKING THE BRAKE FLUID LEVEL" section. 4. Check: • Brake pedal operation A softy or spongy feeling → Bleed brake system. Refer to "BLEEDING THE HY- DRAULIC BRAKE SYSTEM" sec- tion.
3-23 CHASSIS When installing th e drive chain, apply the lithium soap base grease on th e chain joint and O-rings. 7. Install: • Link plate • Press the link plate onto the chain joint using a drive chain riveter "5". • Rivet the end of the ch ain joint us- ing a drive chai n riveter.
3-24 CHASSIS RELIEVING THE FRONT FORK INTERNAL PRESSURE If the front fork in itial movement feels stiff during a run, reli eve the front fork internal pressure. 1. Elevate the front wheel by placing a suitable stand under the engine. 2. Remove the air bleed screw "1" and release the internal pressure from the front fork.
3-25 CHASSIS b. Loosen the adjuster "2" until there is some clearance between the spring and adjuster. c. Measure the spring free le ngth "a". d. Turn the adjuster "2". • Be sure to remove all dirt and mud from around the locknut and ad just- er before adjustment.
3-26 CHASSIS ADJUSTING THE REAR SHOCK ABSORBER HIGH COMPRESSION DAMPING FORCE 1. Adjust: • High compression damping force By turning the adjuster "1". • STANDARD POSITION: This is the position which is back by the specific number of turns from the fully turned-in position.
3-27 CHASSIS 4. Adjust: • Steering ring nut Steering ring nut adjustment steps: a. Remove the headlight. b. Remove the handlebar a nd upper bracket. c. Lo osen the steering ring nut "1" using the steering nut wrench "2 ". d. Tighten the steering ring nut "3" using steering nut wrench "4".
3-28 CHASSIS LUBRI CATION To ensure smooth operation of all components, lubricate your machine during setup, afte r break-in, and after every ride. 1. Al l control cable 2. Clutch lever pivot 3. Sh ift pedal pivot 4. Footrest pivot 5. T hrottle-to-handlebar contact 6.
3-29 ELECTRICAL ELECTRICAL CHECKING THE SPARK PLUG 1. Remove: • Spark plug 2. Inspect: • Electrode "1" Wear/damage → Replace. • Insulator color "2" Normal condition is a medium to light tan color. Distinctly different color → Check the engine condition.
3-30 ELECTRICAL 3. Remove: • Battery band •B a t t e r y 4. Measure: • Battery charge Measurement steps: a. Connect a pocket tester "1" to the battery terminals. • The charge state of an MF battery can be checked by measuring its open-circuit voltage (i.
3-31 ELECTRICAL Charging method using a va riable volta ge charger.
3-32 ELECTRICAL Charging method usin g a constant voltage ch arger.
3-33 ELECTRICAL 6. Install: •B a t t e r y • Battery band 7. Connect: • Battery leads (to the batte ry terminals) First, connect the positiv e lead "1", then the negative lead "2". 8. Check: • Battery terminals Dirt → Cle an with a wire brush.
3-34 ELECTRICAL ADJUSTING THE HEADLIGHT BEAMS 1. Adjust: • Headlight beam (vertically) Adjusting steps: a. Turn the adjusting screw "1" in di- rection "a" or "b". Direction "a" Headlight beam is raised. Direction "b" Headlight beam is lowered.
4-1 ENGINE (Except for Canada) TUNING ENGINE (Except for Canada) CARBURETOR SETTING • The air/fuel mixture will vary de- pending on atmospheric conditi ons. Therefore, it is necessary to take into consideration the air pressure, ambient temperature, hu midity, etc.
4-2 ENGINE (Except for Canada) ADJUSTING THE PILOT JET The richness of the air-fuel mixture with the throttle open 1/4 or less can be set by adjusti ng the pilot jet "1 ". Effects of adjusting the pilot jet (reference) A. Idle B. Fully open 1.
4-3 ENGINE (Except for Canada) CARBURETOR SETTING PARTS Main jet Size Part number (-14943-) Rich #185 4MX-44 #182 4MX-94 #180 4MX-43 #178 4MX-93 #175 4MX-42 #172 4MX-92 #170 4MX-41 #168 4MX-91 #165 4M.
4-4 ENGINE (Except for Canada) EXAMPLES OF CARBURETOR SETTING DEPENDING ON SYMPTOM This shou ld be taken simply fo r an example . It is nece ssary to set the carburetor whil e checking the operating conditio ns of the engine.
4-5 CHASSIS CHASSIS SELECTION OF THE SECONDARY REDUCTION RATIO (SPROCKET) <Requirement for selection of sec- ondary gear reduction ra tio> • It is generally said that the second- ary gear ratio should be reduced for a longer straight portion of a speed course and should be in creased for a course with many corners.
4-6 CHASSIS A. Air spring characteristics in relation to oil l evel change B. Load C. Stroke 1. Max. oil level 2. Standard oil level 3. Min. oil level ADJUSTING THE SPRING PRELOAD The spring preload is adjusted by in- stalling the adjustment washer "1 " be- tween the fork spring "2" and damper rod "3".
4-7 CHASSIS CHOOSING SET LENGTH 1. Place a stand or bl ock under the engine to put the rear wheel above the floor, and measure the length "a" between the rear wheel axle center and the re ar fender holding bolt.
4-8 CHASSIS • Extent of adjustment (spring pre- load) For the spring preload adjustment, re- fer to "ADJUSTING THE REAR SHOCK ABSORBER SPRING PRE- LOAD" in the C HAPTER 3. SPRING PART NUM- B E R (-22212-) Maximum Minimum 5UN-00 5UN-10 5UN-20 5UN-30 Position in which the spring is turned in 20 mm (0.
4-9 CHASSIS SUSPENSION SETTING (FRONT FORK) • If any of the following symptoms is experienced with the standard position as the base, make resetting by reference to the adjustment procedure gi ven in the same chart. • Before any change, set t he rear shock absorb er sunken length to the standard figure 90–100 mm (3.
4-10 CHASSIS SUSPENSION SETTING (REAR SHOCK ABSORBER) • If any of the following symptoms is experienced with the standard position as the base, make resetting by reference to the adjustment procedure gi ven in the same chart. • Adjust the rebound damp ing in 2-click increments or decrements.
5-1 RADIATOR ENGINE This section is intended for those who have basi c knowled ge and skill concerning the servicing of Yamaha motorcycles (e.g., Yamaha dealers, se rvice engineers, etc.
5-2 RADIATOR 6 Radia tor hose 4 1 7 Pipe 2/O-ring 1/1 8 Catch tank hose 1 9 Left r adiator 1 10 Radiator hose 1 1 11 Pipe 1 /O-ring 1/1 12 Ca tch tank breather hose 1 13 Ca tch tank 1 Order Part name .
5-3 RADIATOR HANDLING NOTE Do not remove the radiator cap when the engine and ra diator are hot. Scaldi ng hot fluid and steam may be blown out under pressure, which could ca use serious injury .
5-4 CARBURETOR CARBURETOR REMOVING THE CARBURETOR Order Part name Q'ty Remarks Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Rear shock absorber Refer to "REAR SHOCK ABSORBER" sec- tion in the CHAPTER 6.
5-5 CARBURETOR 13 Bracket (cyli nder head breather pipe) 1 14 Ca rburetor joint 1 Order Part name Q'ty Remarks.
5-6 CARBURETOR DISASSEMBLING THE CARBURETOR Order Part name Q'ty Remarks 1 Carburetor breather hose 4 2 Valve lever housing cover 1 3 Screw (throttle shaft) 1 4 Throttle valve 1 5 Need le holder .
5-7 CARBURETOR 19 Main jet 1 20 Ne edle jet 1 21 Spacer 1 22 Pil ot jet 1 23 Starter j et 1 24 Push rod 1 Pull the push rod. 25 Throttl e shaft assembly 1 26 Push rod link lever assembly 1 27 Pil ot a.
5-8 CARBURETOR HANDLING NOTE Do not loosen th e screw (throttle position sensor) "1" except when changing the th rottle position sen- sor due to failur e because it will cause a drop in engine pe rfor- mance. REMOVING THE PILOT SCREW (For EUROPE) 1.
5-9 CARBURETOR e. If both are fine, adjust the float height by bending th e float tab "b" on the float. f. Recheck the float height. CHECKING THE FLOAT 1.
5-10 CARBURETOR • Apply th e fluorochemical grease on the bearings. • Fit the projection "a" on the throttle shaft assembly into the slot "b" in the throttle posit ion sensor. • Make sure the stopper "c" of the spring fits into the recess in the car- buretor .
5-11 CARBURETOR 16. Install: • Jet needle "1" •C o l l a r " 2 " • Spring "3" • Needle ho lder "4" • Throttle valve plate "5" To throttle valve "6 ".
5-12 CARBURETOR 5. Install: • Throttle cable (pull) "1" • Throttle cable (return) "2" 6. Adjust: • Throttle grip free play Refer to "ADJUSTING THE THROTTLE CABLE FREE PLAY" section in the CHAPTER 3. 7. Install: • Throttle cable cover "1" • Bolt (throt tle cable cover) "2" 8.
5-13 AIR INDICTOIN SYSTEM AIR INDICTOIN SYSTEM REMOVING THE AIR INDUCTION SYSTEM Order Part name Q'ty Remarks 1 Bracket 1 2 Air cut-off valve assembly 1 3 Air induction hose (ai r cut-off valve -.
5-14 AIR INDICTOIN SYSTEM CHECKING THE AIR INDUCTION SYSTEM 1. Inspect: • Air induction hose Crack/damage → Replace. • Air induction pip e Crack/damage → Replace. 2. Check: • Operation of air cut valve Pass air through the pipe and check the air cut valve for opera- tion.
5-15 CAMSHAFTS CAMSHAFTS REMOVING THE CYLINDER HEAD COVER Order Part name Q'ty Remarks Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3. Air cut-off valve assembly Refer to "AIR INDUCTION SYSTEM" sectio n.
5-16 CAMSHAFTS REMOVING THE CAMSHAFTS Order Part name Q'ty Remarks 1 Timing mark accessing screw 1 Refer to removal section. 2 Crankshaft end accessing screw 1 Refer to removal section. 3 Timing chain tensioner cap bolt 1 Refer to removal section.
5-17 CAMSHAFTS REMOVING THE CAMSHAFT 1. Remove: • Timing mark accessing screw "1" • Crankshaft end acce ssing screw "2" 2. Align: • T.D.C. mark With align mark. Checking steps: a. Turn the crankshaft counterclock- wise with a wren ch.
5-18 CAMSHAFTS 3. Measure: • Runout (camshaft) Out of specification → Replace. 4. Measure: • Camshaft-to-cap clearance Out of specification → Measure camshaft outside diamete r. Measurement steps: a. Install the camshaft onto the cylin- der head.
5-19 CAMSHAFTS INSTALLING THE CAMSHAFT 1. Install: • Exhaust camshaft "1" • Intake camshaft "2" Installation steps: a. Turn the crankshaft counterclock- wise with a wren ch. • Apply the moly bdenum disulfide oil on the camshafts.
5-20 CYLINDER HEAD CYLINDER HEAD REMOVING THE CYLINDER HEAD Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb ) in the proper ti ghtening sequenc e, remove and retighten the cylinder head bolts to 20 Nm (2.
5-21 CYLINDER HEAD CHECKING THE CYLINDER HEAD 1. Eliminate: • Carbon deposits (from the com- bustion chambers) Use a rounded scraper. Do not use a sharp instrument to avoid damaging or scratching: • Spark plug threads • Valve seats 2. Inspect: • Cylinder head Scratches/damage → Replace.
5-22 CYLINDER HEAD 3. Install: • Bolt (cylinder head) "1" Bolt (cylinder head): 10 Nm (1.0 m•kg, 7.2 ft•lb).
5-23 VALVES AND VALVE SPRINGS VALVES AND VALVE SPRINGS REMOVING THE VALVES AND VALVE SPRINGS Order Part name Q'ty Remarks Cylinder head Refer to "CYLINDER HEAD" section. 1 Valve lifter 5 Refer to removal section. 2 Adjusting pad 5 Refer to removal section.
5-24 VALVES AND VALVE SPRINGS REMOVING THE VALVE LIFTER AND VALVE COTTER 1. Remove: • Valve lifter "1" • Pad "2" Identify each lifter "1" and pad "2" po- sition very carefully so that they can be reinstalled in their original place.
5-25 VALVES AND VALVE SPRINGS 3. Inspect: • Valve face Pitting/wear → Grind the face. • Valve stem end Mushroom shape or diameter larger than the body o f the stem → Replace. 4. Measure: • Margin thickness "a" Out of specification → Replace.
5-26 VALVES AND VALVE SPRINGS h. Press the valve thro ugh the valve guide and onto the valve seat to make a clear pattern. i. Measure the valve seat width again. If the valve seat width is out of specification, reface and relap the valve seat. CHECKING THE VALVE SPRINGS 1.
5-27 CYLINDER AND PISTON CYLINDER AND PISTON REMOVING THE CYLINDER AND PISTON Order Part name Q'ty Remarks Cylinder head Refer to "CYLINDER HEAD" section. 1 Bolt (cylinder) 1 2 Cylinder 1 3 Gasket 1 4 Dowel pin 2 5 Piston pin clip 2 Refer to removal section.
5-28 CYLINDER AND PISTON REMOVING THE PISTON AND PISTON RING 1. Remove: • Piston pin clip "1" • Piston pin "2" • Piston "3" • Put identification marks on ea ch piston head for reference during re- installation. • Before removing each piston pin, deburr the clip groove and pin hole area.
5-29 CYLINDER AND PISTON 3. Measure: • Ring end gap Out of specification → Replace. You cannot measure the end gap on the expander spacer of the oil control ring. If the oil control ring rails show excessive gap, replace all three rings. CHECKING THE PISTON PIN 1.
5-30 CLUTCH CLUTCH REMOVING THE CLUTCH Order Part name Q'ty Remarks Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Brake pedal Refer to "ENGINE REMOVAL" secti on. Clutch cable Disconnect at eng ine side.
5-31 CLUTCH 14 Nut (clutch boss) 1 Refer to removal section. 15 Lo ck washer 1 Refer to removal section. 16 Cl utch boss 1 Refer to removal section. 17 Thrust wa sher 1 18 Primary driven gear 1 19 Pus.
5-32 CLUTCH REMOVING THE CLUTCH BOSS 1. Remove: •N u t " 1 " • Lock washer "2" • Clutch boss "3 " Straighten the lock washer tab and use the clutch holding tool "4" to hold the clutch boss. A. For USA and CDN B.
5-33 CLUTCH 2. Install: • Lock washer "1" • Nut (clutch boss) " 2" Make sure to tighten to specifica- tion; otherw ise, it may damage the other part that is fastened togeth- er. • Install the lock washer with its con- caves fitted over the convexes of the clutch boss.
5-34 OIL FILTER ELEMENT AND WATER PUMP OIL FILTER ELEMENT AND WATER PUMP REMOVING THE OIL FILTER ELEMENT AND WATER PUMP Order Part name Q'ty Remarks Right engine guard Refer to "ENGINE REMOVAL" section. Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3.
5-35 OIL FILTER ELEMENT AND WATER PUMP 9 Gasket 1 10 Do wel pin/O-ring 3/1 11 Impell er 1 Refer to removal section. 12 Washer 1 Refer to removal section. 13 Impell er shaft 1 Refer to removal section. 14 Oil seal 1 1 Refer to removal section. 15 Oil seal 2 1 Refer to removal section.
5-36 OIL FILTER ELEMENT AND WATER PUMP REMOVING THE IMPELLER SHAFT 1. Remove: • Impelle r "1" • Washer "2" • Impeller sha ft "3" Hold the impeller shaft on its width across the flats "a" with spanners, etc.
5-37 OIL FILTER ELEMENT AND WATER PUMP 2. Install: • Right crankcase cover "1" •B o l t " 2 " •B o l t • Apply the engin e oil on the impeller shaft end. • When installing the crankcase cov- er onto the crankca se, be sure that the impeller shaft end "2" aligns with the balancer end slot "3".
5-38 BALANCER BALANCER REMOVING THE BALANCER Order Part name Q'ty Remarks Primary driven gear Refer to "CLUTCH" secti on. Right crankcase cover Refer to "OIL FILTER ELEMENT AND WA- TER PUMP" section. Stator Refer to "CDI MAGNETO" section.
5-39 BALANCER REMOVING THE BALANCER 1. Straighten the lock wa sher tab. 2. Loosen: • Nut (balancer) "1" • Nut (primary drive gear) "2" • Nut (balancer shaft driven gear) "3" Place an aluminum plate "a" b etween the teeth of the balancer shaft drive gear "4" and driven gear "5".
5-40 OIL PUMP OIL PUMP REMOVING THE OIL PUMP Order Part name Q'ty Remarks Primary driven gear Refer to "CLUTCH" section. Right crankcase cover Refer to "OIL FILTER ELEMENT AND WA- TER PUMP" section.
5-41 OIL PUMP 15 Oil pump drive shaft 1 16 Ro tor housing 1 Order Part name Q'ty Remarks.
5-42 OIL PUMP CHECKING THE OIL PUMP 1. Inspect: • Oil pump drive gear • Oil pump drive shaft • Rotor housing • Oil pump cover Cracks/wear/damage → R eplace.
5-43 KICK SHAFT AND SHIFT SHAFT KICK SHAFT AND SHIFT SHAFT REMOVING THE KICK SHAFT AND SHIFT SHAFT Order Part name Q'ty Remarks Oil pump Refer to "OIL PUMP" section.
5-44 KICK SHAFT AND SHIFT SHAFT 17 Pawl 2 18 Pawl pin 2 19 Sprin g 2 20 Bol t (stopper lever) 1 21 Stopp er lever 1 22 Torsion spring 1 23 Segment 1 Refer to removal section.
5-45 KICK SHAFT AND SHIFT SHAFT REMOVING THE KICK SHAFT ASSEMBLY 1. Remove: • Kick shaft assembly "1" Unhook the torsion spring "2" from the hole "a" in the crankcase. REMOVING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY 1.
5-46 KICK SHAFT AND SHIFT SHAFT INSTALLING THE SHIFT GUIDE AND SHIFT LEVER ASSEMBLY 1. Install: • Spring "1" • Pawl pin "2" •P a w l " 3 " To shift lever "4". Apply the engine oil on the spring, pawl pin and p awl.
5-47 KICK SHAFT AND SHIFT SHAFT INSTALLING THE KICK IDLE GEAR 1. Install: • Kick idle gear "1" • Washer "2" • Circlip "3" • Apply th e engine oil on the kick id le gear inner circumference. • Install th e kick idle gear with its de- pressed side "a " toward you.
5-48 AC MAGNETO AND STARTER CLUTCH AC MAGNETO AND STARTER CLUTCH REMOVING THE AC MAGNETO AND STARTER CLUTCH Order Part name Q'ty Remarks Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3. Seat and fuel ta nk Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3.
5-49 AC MAGNETO AND STARTER CLUTCH Tighten the rotor nut to 65 Nm (6.5 m•kg, 47 ft•lb), loosen and retighten th e rotor nut to 65 Nm (6.5 m•kg, 47 ft•lb). 12 Woodru ff key 1 13 Starter clutch assembly co ver 1 Refer to removal section. 14 Starter clu tch 1 Refer to removal section.
5-50 AC MAGNETO AND STARTER CLUTCH REMOVING THE ROTOR 1. Remove: • Nut (rotor) " 1" • Washer Use the sheave holder "2". 2. Remove: • Rotor "1" Use the rotor puller "2".
5-51 AC MAGNETO AND STARTER CLUTCH • Pass the AC magn eto lead "5" un- der the pickup coil. • Pass the AC magn eto lead "4" un- der the holder as shown. • Take care not to catch the AC mag- neto lead between crankcase cover ribs.
5-52 AC MAGNETO AND STARTER CLUTCH 10. Install: • Cover (idle gear 1) "1" •B o l t " 2 " Install the co ver (idle gear 1) with its mark "a" facing upw ard. 11. Connect: • AC magne to lead Refer to "CABLE R OUTING DIA- GRAM" section in the CHAPTER 2.
5-53 ENGINE REMOVAL ENGINE REMOVAL REMOVING THE ENGINE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the frame. Refer to "HANDLING NOTE". Drain the engine oil . Refer to "CHANGING THE ENGINE OIL" section in the CHAPTER 3.
5-54 ENGINE REMOVAL Ignition coil Disconnect the AC magneto lead. Disconnect the starter motor lead. Refer to "ELECTRIC STARTING SYSTEM" section in the CHAPTER 7. Negative battery lead Disconnect at the engine side. 1 Engine guard 1 2 Neutr al switch 1 3 Drive chain sprocket cover 1 4 Nut (drive sprocket) 1 Ref er to removal section.
5-55 ENGINE REMOVAL HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE DRIVE SPROCKET 1. Remove: • Nut (drive sprocket) "1" • Lock washer "2" • Straighten the lock wa sher tab. • Loosen the nut while applying the rear brake.
5-56 ENGINE REMOVAL • Nut (drive sprocket) "2" Tighten the nut while applying the rear brake. Make sure to tighten to specifica- tion; otherw ise, it may damage the other part that is fastened togeth- er. 3. Bend the lock washer tab to lock the nut.
5-57 CRANKCASE AND CRANKSHAFT CRANKCASE AND CRANKSHAFT REMOVING THE CRANKSHAFT Order Part name Q'ty Remarks Engine Refer to "ENGINE REMOVAL" section. Piston Refer to "CYLINDE R AND PISTON" section. Balancer Refer to "BALANCER" section.
5-58 CRANKCASE AND CRANKSHAFT 9 Left crankcase 1 Refer to removal section. 10 Oil strai ner 1 11 Bal ancer shaft 1 Refer to removal section. 12 Cranksh aft 1 Refer to removal section.
5-59 CRANKCASE AND CRANKSHAFT REMOVING THE CRANKCASE BEARING Order Part name Q'ty Remarks Transmission Refer to "TRANSMISSION, SHIFT CAM AND SHIFT FORK" section. Shift cam and shift fork Refer to "TRANSMISSION, SHIFT CAM AND SHIFT FORK" section.
5-60 CRANKCASE AND CRANKSHAFT DISASSEMBLING THE CRANKCASE 1. Separate: • Right crankca se • Left crankcase Separation steps: a. Remove the crankcase bolts, hose guide an d clutch cable hold- er. Loosen each bolt 1/4 of a turn at a time and after all the bolts are loos- ened, remove them.
5-61 CRANKCASE AND CRANKSHAFT CHECKING THE CRANKSHAFT 1. Measure: • Runout limit "a" • Small end free play limit "b" • Connecting rod big end side clearance "c" • Crank widt h "d" Out of specification → Replace.
5-62 CRANKCASE AND CRANKSHAFT 4. Apply: • Sealant On the right crankc ase. Clean the contacting surface of left and right crankcase before applying the sealant. 5. Install: • Dowel pin "1" • O-ring "2" • Right crankca se To left crankcase.
5-63 TRANSMISSION, SHIFT CAM AND SHIFT FORK TRANSMISSION, SHIFT CAM AND SHIFT FORK REMOVING THE TRANSMISSION, SHIFT CAM AND SHIFT FORK Order Part name Q'ty Remarks Engine Refer to "ENGINE REMOVAL" section. Separate the crankcase. Refer to "CRANKCASE AND CRANK- SHAFT" section.
5-64 TRANSMISSION, SHIFT CAM AND SHIFT FORK REMOVING THE TRANSMISSION 1. Remove: • Main axle "1" • Drive axle "2" • Shift cam • Shift fork 3 • Shift fork 2 • Shift fork 1 • Remove assemb ly with the collar "3" installed to the crankcase.
5-65 TRANSMISSION, SHIFT CAM AND SHIFT FORK 3. Install: • Washer "1" • Circlip "2" • Be sure the circlip sharp-edged cor- ner "a" is po sitioned opposi te side to the washer and gear "b". • Install the circlip with its ends "c" settled evenly on the spline crests.
6-1 FRONT WHEEL AND REAR WHEEL CHASSIS This section is intended for those who have basi c knowled ge and skill concerning the servicing of Yamaha motorcycles (e.
6-2 FRONT WHEEL AND REAR WHEEL REMOVING THE REAR WHEEL Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". 1 Nut (rear wheel axle) 1 2 Rear whe el axle 1 3 Drive chain puller 2 4 Rear wheel 1 Refer to removal section.
6-3 FRONT WHEEL AND REAR WHEEL HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE REAR WHEEL 1. Remove: • Wheel "1" Push the wheel forward and remove the drive chain "2". REMOVING THE WHEEL BEARING 1.
6-4 FRONT WHEEL AND REAR WHEEL 2. Install: • Brake disc "1" • Bolt (brake disc) "2" Tighten the bolts in stage, using a crisscross pattern. 3. Install: •C o l l a r " 1 " Apply the lithium soap base grease on the oil seal lip.
6-5 FRONT WHEEL AND REAR WHEEL 2. Install: • Brake disc "1" • Bolt (brake disc) "2" Tighten the bolts in stage, using a crisscross pattern.
6-6 FRONT BRAKE AND REAR BRAKE FRONT BRAKE AND REAR BRAKE REMOVING THE FRONT BRAKE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Drain the brake fluid. Refer to removal section.
6-7 FRONT BRAKE AND REAR BRAKE REMOVING THE REAR BRAKE Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Rear wheel Refer to "FRONT WHEEL AND REAR WHEEL" section.
6-8 FRONT BRAKE AND REAR BRAKE DISASSEMBLING THE BRAKE CALIPER Order Part name Q'ty Remarks A. Front B. Rear AB 1P a d p i n 1 1 2 Brake pad 2 2 3 Pad support 1 1 4 Brake caliper piston 2 1 Re fer to removal section. 5 Brake caliper piston dust s eal 2 1 Refer to removal section.
6-9 FRONT BRAKE AND REAR BRAKE DISASSEMBLING THE BRAKE MASTER CYLINDER Order Part name Q'ty Remarks A. Front B. Rear 1 Brake master cylinder cap 1 2 Diaphragm 1 3 Reserv oir floa t 1 4 Brake master cylinder boot 1 5 Circlip 1 Use a long nose circlip pliers.
6-10 FRONT BRAKE AND REAR BRAKE HANDLING NOTE Support the machine securely so there is no dange r of it falling over. DRAINING THE BRAKE FLUID 1. Remove: • Brake master cylinder cap "1" • Protector (rear brake) Do not remove the diaphragm.
6-11 FRONT BRAKE AND REAR BRAKE 3. Inspect: (front brake only) • Reservoir fl oat "1" Damage → Replace. 4. Inspect: • Brake master cylinder piston "1" • Brake master cylinder cup "2" Wear/damage/score marks → Re- place brake master cylinder kit.
6-12 FRONT BRAKE AND REAR BRAKE 2. Install: • Brake caliper "1" • Bolt (brake caliper) "2" 3. Tighten: • Pad pin "3" 4.
6-13 FRONT BRAKE AND REAR BRAKE INSTALLING THE FRONT BRAKE MASTER CYLINDER 1. Install: • Brake master cylinder "1" • Brake master cylinder bracket "2" • Bolt (brake master cylinder b rack- et) "3" • Install the bracket so th at the arrow mark "a" face upward.
6-14 FRONT BRAKE AND REAR BRAKE 2. Install: • Brake hose holder "1" • Bolt (brake hos e holder) "2" 3. Install: • Brake hose holder "1" • Nut (brake hose holder) "2" Align the top "a" of the brake hose holder with the paint "b" of the brake hose.
6-15 FRONT BRAKE AND REAR BRAKE A. Front B. Rear 2. Air bleed: • Brake system Refer to "BLEEDING THE HY- DRAULIC BRAKE SYSTEM" sec- tion in the CHAPTER 3. 3. Inspect: • Brake fluid level Fluid at lower l evel → Fill up . Refer to "CHECKING THE BRAKE FLUID LEVEL" section in the CHAPTER 3.
6-16 FRONT FORK FRONT FORK REMOVING THE FRONT FORK Order Part name Q'ty Remarks A. For CDN Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Front wheel Refer to "FRONT WHEEL AND REAR WHEEL" section.
6-17 FRONT FORK DISASSEMBLING THE F RONT FORK Order Part name Q'ty Remarks 1 Front fork cap bolt 1 Refer to removal section. 2 Fork spring 1 Drain the fork oil. 3 Dust seal 1 Refer to removal section. 4 Stopper ring 1 Refer to removal section. 5 Inner tube 1 Refer to removal section.
6-18 FRONT FORK HANDLING NOTE Support the machine securely so there is no dange r of it falling over. The front fork requires careful atten- tion. So it is recommended that the front fork be maintained at the deal- ers.
6-19 FRONT FORK The bending value is shown by one half of the dial gauge reading. Do not attempt to straighten a bent inner tube as this may dan gerous- ly weaken the tube . CHECKING THE OUTER TUBE 1. Inspect: • Outer tube "1 " Score marks/we ar/damage → Re- place.
6-20 FRONT FORK 8. Install: • Outer tube "1 " To inner tube "2". 9. Install: • Slide me tal "1" • Oil seal washer "2" To outer tube slot. Press the slide metal into the outer tube with fork seal driver "3".
6-21 FRONT FORK 20. Measure: • Oil level (left and right) "a" Out of specification → Adjust. Be sure to install the spring guide "2" when checking the oil level. Never fail to make the oil level ad- justment between the maximum and minimum level and always ad - just each front fork to the same setting.
6-22 FRONT FORK INSTALLING T HE FRONT FORK 1. Install: • Front fork "1" • Temporarily tighte n the pinch bolts (lower brack et). • Do not tighten the pinch bolts (up- per bracket) yet. 2. Tighten: • Front fork cap bolt 3. Adjust: • Front fork top e nd "a" 4.
6-23 HANDLEBAR HANDLEBAR REMOVING THE HANDLEBAR Order Part name Q'ty Remarks Headlight 1 Hot starter cable 1 Disconnect at the lever side. 2 Hot start er lever hol der 1 3 Clutch cable 1 Disconnect at the lever side. 4 Clutch lever holder 1 Disconnect the clutch switch lead.
6-24 HANDLEBAR REMOVING THE BRAKE MASTER CYLINDER 1. Remove: • Brake master cylinder bracket "1" • Brake master cylinder "2" • Do not let the brake master cylin- der hang on th e brake hose. • Keep the brake master cylinder cap side horizontal to prevent air from coming in.
6-25 HANDLEBAR 5. Install: • Right grip "1" •C o l l a r " 2 " Apply the adhesive o n the tube guide "3". • Before applying the adhe sive, wipe off grease or oil on the tube guide surface "a" with a lacquer thinner.
6-26 HANDLEBAR 12. Install: • Clutch cable "1" • Hot starter cable "2" Apply the lithium soap base grease on the clutch cable end and hot start- er cable end. 13. Adjust: • Clutch lever free play Refer to "ADJUSTING THE CLUTCH CABLE FREE PLAY" section in the CHAPTER 3.
6-27 STEERING STEERING REMOVING THE STEERING Order Part name Q'ty Remarks A. For CDN TIGHTENING STEPS: • Tighten ring nut. 38 Nm (3.8 m•kg , 27 ft•lb) • Loosen it one turn. • Retighten it. 7 Nm (0.7 m•kg, 5.1 ft•lb) Hold the machine by placing the suitable stand under the engine.
6-28 STEERING 8 Lower bracket 1 9 Bearing race cover 1 10 Up per bearing 1 11 Lo wer bearing 1 Refer to removal section. 12 Beari ng race 2 Refer to removal section.
6-29 STEERING HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE STEERING RING NUT 1. Remove: • Steering ring nut "1" Use the steering nut wrench "2". Support the steering st em so that it may not fall d own.
6-30 STEERING 6. Install: • Washer "1" 7. Install: • Front fork "1" • Upper bracket "2" • Main switch "3" • Front brake hose guide bracket "4&quo.
6-31 SWINGARM SWINGARM REMOVING THE SWINGARM Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Brake hose holder Refer to "FRONT BRAKE AND REAR BRAKE" section.
6-32 SWINGARM DISASSEMBLING THE SWINGARM Order Part name Q'ty Remarks 1 Cap 2 Refer to removal section. 2 Relay arm 1 3 Connecting rod 1 4 Collar 2 5 Oil seal 2 6 Thrust bearing 2 7 Bushing 2 8 Oil seal 8 9 Bearing 10 Refer to remova l section.
6-33 SWINGARM HANDLING NOTE Support the machine securely so there is no dange r of it falling over. REMOVING THE CAP 1. Remove: • Left cap "1" Remove with a slotted-head screw- driver inserted under the mark " a" on the left cap.
6-34 SWINGARM INSTALLING THE SWINGARM 1. Install: • Bushing "1" • Thrust bearing "2" • Oil seal "3" •C o l l a r " 4 " To swingarm "5" Apply the molybdenum disulfide grease on the bushin gs, thrust bear- ings, oil seal lips and contact surfaces of the collar and thrust b earing.
6-35 SWINGARM 10. Tighten: • Nut (connectin g rod) "1" 11. Tighten: • Nut (relay arm) "1" 12. Install: •C a p " 1 " Install the right cap with its mark "a" facing forward.
6-36 REAR SHOCK ABSORBER REAR SHOCK ABSORBER REMOVING THE REAR SHOCK ABSORBER Order Part name Q'ty Remarks Hold the machine by placing the suitable stand under the engine. Refer to "HANDLING NOTE". Seat and side cover Refer to "REMOVING THE SEAT, FUEL TANK AND SIDE COVERS" section in the CHAPTER 3.
6-37 REAR SHOCK ABSORBER 2 Taillight coupler 1 3 CDI unit coupler 3 4 Plastic band 1 5 Clamp (air filter joint) 1 Only loosening. 6R e a r f r a m e 1 7 Bolt (rear shock absorber-relay arm) 1 Hold the swingarm. 8 Bolt (rear shock absorber-frame) 1 9 Rear shock absorber 1 10 Lo cknut 1 Only loosening.
6-38 REAR SHOCK ABSORBER HANDLING NOTE • Support the machine securely so there is no danger of it falling over. • This rear shock absorber is pro- vided with a separate type tank filled with high- pressure nitro- gen gas.
6-39 REAR SHOCK ABSORBER 2. Install: • Stopper ring (uppe r bearing) "1" After installing the sto pper ring, push back the bearing until it contacts the stopper ring. 3. Install: • Lower bearin g "1" Install the bearing by pressing it on the side having the manufacture' s marks or numbers.
6-40 REAR SHOCK ABSORBER 7. Tighten: • Screw (air filter joint) "1" 8. Install: • Plastic band • Taillight coupler • Locking tie Screw (air filter joint): 3 Nm (0.
7-1 ELECTRICAL COMPONENTS AND WIRING DIAGRAM ELECTRICAL This section is intended for those who have basi c knowled ge and skill concerning the servicing of Yamaha motorcycles (e.
7-2 ELECTRICAL COMPONENTS AND WIRING DIAGRAM WIRING DIAGRAM 1. H eadlight 2. Mu lti-function display 3. En gine stop switch 4. C lutch switch 5. D iode 6. Starter relay dio de 7. T hrottle position sensor 8. Starter relay 9. F use 10. Starting circuit cut-off relay 11.
7-3 IGNITION SYSTEM IGNITION SYSTEM INSPECTION STEPS Use the following steps for checking the possibility of the malfuncti oning engine being attributable to igni tion system failure and for checking the spa rk plug which will no t spark. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3.
7-4 IGNITION SYSTEM SPARK GAP TEST 1. Disconnect the ignition coil from spark plug. 2. Remove the ignition co il cap. 3. Connect the dynamic spark tester "1" (ignition ch ecker "2") as shown. • Ignition coil "3" • Spark plug "4" A.
7-5 ELECTRIC STARTING SYSTEM 3. Inspect: • Secondary coil resistance Out of specification → Replace. 4. Inspect: • Sealed portion of ignition coil "a" • Spark plug termin al pin "b" • Threaded porti on of spark plug "c" Wear → Rep lace.
7-6 ELECTRIC STARTING SYSTEM INSPECTION STEPS If the starter motor will not operate, use the fo llowing inspection steps. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3. *2 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3.
7-7 ELECTRIC STARTING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and lead s connection Rust/dust/looseness/short-circuit → Repair o r replace. CHECKING THE STARTER MOTOR OPERATION 1. Connect the posi tive battery ter- minal "1" and starter motor lead "2" with a jumper lead "3".
7-8 ELECTRIC STARTING SYSTEM CHECKING THE START SWITCH 1. Inspect: • Start switch conduction Not conductive while it is pushed → Replace. Conductive while it is freed → Re - place. Set the tester selection position to " Ω × 1". 2. Inspect: • Rubber part "a" Tears/damage → Replace.
7-9 ELECTRIC STARTING SYSTEM REMOVING THE STARTER MOTOR Order Part name Q'ty Remarks Exhaust pipe Refer to "REMOVING THE EXHAUST PIPE AND SILENCER" section in the CHAPTER 3.
7-10 ELECTRIC STARTING SYSTEM DISASSEMBLING THE STARTER MOTOR Order Part name Q'ty Remarks 1 Starter motor front cover 1 2 Washer (starter motor front cover) 1 3 Washer 1 4 Circlip 1 5O - r i n g.
7-11 ELECTRIC STARTING SYSTEM CHECKING AND REPAIRING THE STARTER MOTOR 1. Check: • Commutator Dirt → Cle an with 600 grit sandpa- per. 2. Measure: • Commutator diameter "a" Out of specification → Replace the starter motor.
7-12 ELECTRIC STARTING SYSTEM 4. Install: • O-ring "1" • Circlip • Plain washer "2" • Washer (starter motor front cover) "3" • Starter motor front cover "4" • For installatio n, align the projec- tions on the washer with the slots in the front cover.
7-13 CHARGING SYSTEM CHARGING SYSTEM INSPECTION STEPS If the battery is not charged, use the followin g inspection steps. *1 marked: Refer to "CHECKING TH E FUSE" section in the CHAPTER 3. *2 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3.
7-14 CHARGING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and lead s connection Rust/dust/looseness/short-circuit → Repair o r replace.
7-15 THROTTLE POSITION SENSOR SYSTEM THROTTLE POSITION SENSOR SYSTEM INSPECTION STEPS If the throttle position senso r will not operate, use the follo wing inspection steps. Use the following special to ols in this inspection. Check entire ignition system for connection.
7-16 THROTTLE POSITION SENSOR SYSTEM HANDLING NOTE Do not loosen th e screw (throttle position sensor) "1" except when changing the th rottle position sen- sor due to failur e because it will cause a drop in engine pe rfor- mance. CHECKING THE COUPLERS AND LEADS CONNECTION 1.
7-17 THROTTLE POSITION SENSOR SYSTEM 9. Adjust: • Throttle positi on sensor outpu t voltage Adjustme nt steps: a. Adjust the installa tion angle of the throttle position sensor "1" to ob- tain the specified output voltage.
7-18 LIGHTING SYSTEM LIGHTING SYSTEM INSPECTION STEPS Refer to th e followin g flow chart when inspect ing the li ghting syste m for possibl e problems. • Remove the follo wing parts before i nspection. 1. Seat 2. Fuel tank 3. Left side cover • Use the follow ing special tools in this inspection.
7-19 LIGHTING SYSTEM CHECKING THE TAILLIGHT (LEDs) 1. Disconnect the taillight coupler. 2. Connect two jumper leads "1" from the battery terminals to the respective coupler terminal as shown. 3. Check: • LED (for proper operation) Does not light → Replace the tail- light assemb ly.
7-20 SIGNALING SYSTEM SIGNALING SYSTEM INSPECTION STEPS If the speedometer will not operate , use the following inspection steps. *1 marked: Refer to "CHECKING AND CHARGIN G THE BATTERY" section in the CHAPTER 3. • Remove the follo wing parts before i nspection.
7-21 SIGNALING SYSTEM CHECKING THE COUPLERS AND LEADS CONNECTION 1. Check: • Couplers and lead s connection Rust/dust/looseness/short-circuit → Repair o r replace. CHECKING THE MULTI-FUNCTION DISPLAY INPUT VOLTAGE 1. Disconn ect the multi- function dis- play coupler.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Yamaha WR450F (2011) è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Yamaha WR450F (2011) - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Yamaha WR450F (2011) imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Yamaha WR450F (2011) ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Yamaha WR450F (2011), ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Yamaha WR450F (2011).
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Yamaha WR450F (2011). Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Yamaha WR450F (2011) insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.
