Crankcase Bearing Removal | Yamaha WR45OFR guide

CRANKCASE AND CRANKSHAFT

CRANKCASE BEARING

ENG

Extent of removal:					1 Crankcase bearing removal

Extent of removal				Order	Part name	Q’ty		Remarks

					CRANKCASE BEARING
					REMOVAL
Preparation for removal					Transmission			Refer to “TRANSMISSION, SHIFT
Preparation for removal					Transmission			Refer to “TRANSMISSION, SHIFT
					Shift cam and shift fork			CAM AND SHIFT FORK” section.
					Shift cam and shift fork			CAM AND SHIFT FORK” section.

				1	Oil seal	3

	1
	1			2	Bearing	10		Refer to “REMOVAL POINTS”.

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Yamaha WR45OFR service manual Crankcase Bearing Removal

Contents

WR450FR Page By Yamaha Motor Corporation, U.S.A 1st Edition, October WR450FRLIT-11626-16-43 Introduction Page Always Wear Protective Apparel Always Maintain Your Machine in Proper Working Order Park the Machine Carefully Turn OFF the Engine Gasoline can Cause InjuryProperly Secure the Machine Before Transporting IT M. Machine Weights Weights of machines without fuel Particularly Important Information Finding the Required HOW to Read Descriptions Manual Format GEN Spec Info Insp ENG ADJ Memo Index Chapter Regular Inspection Adjustments SEAT, Fuel Tank Side Covers Front Wheel and Rear Wheel Front Brake and Rear Brake Electrical Components TPS Throttle Position Sensor Description Info Description Engine Serial Number Machine IdentificationVehicle Identification Number Model Label Preparation for Removal and Disassembly Important Information GASKETS, OIL Seals and O-RINGS ALL Replacement PartsLock WASHERS/PLATES and Cotter Pins Bearings and OIL Seals Circlips Checking of Connection Part number Tool name/How to use Illustration Special Tools GEN Info ACC-QUICK-GS-KT Start Switch Main SwitchMain switch indicator light Control Functions Kickstarter Clutch LeverShift Pedal Throttle Grip Cold Starter Knob Rear Brake PedalFuel Cock HOT Starter Lever Spark Plug Wrench Lights SwitchValve Joint Nipple Wrench Fuel Starting and BREAK-IN AIR Filter MaintenanceStarting a Cold Engine Do not warm up the engine for extended periods of time Restarting an engine after a fall Starting a Warm EngineEngine fails to start About one hour of break-in operation is necessary BREAK-IN ProceduresCylinder and Crankshaft PISTON, RING, VALVES, Camshafts and Gears TORQUE-CHECK Points Cleaning and Storage Cleaning Storage General Specifications 5TJ4 CDN, AUS, NZ, ZA FCR MX39 CDI Maintenance Specifications Engine Seat Width 7083 ~ 0.7087 7075 Spec USA CDN, AUS, NZ Spec Standard Lubrication chart Part to be tightened Thread size ’ty Tightening torque Oil strainer frame Chassis USA, CDN Europe AUS, NZ, ZA DID520VM/DAIDO Handle crown and outer tube Rear wheel axle and nut M4 ⋅ Electrical 5TA-00/DENSO ACM33221 M06/MATSUSHITA Torque General Torque SpecificationsDefinition of Units Mkg Ftlb 10 mm 12 mm 14 mm 17 mm 19 mm 22 mm 16 mm 130 Lubrication Diagrams Spec Cable Routing Diagram Spec Spec Spec Spec Spec Maintenance Intervals Insp ADJ Shift FORK, Shift CAM, Guide BAR Marked For USA PRE-OPERATION Inspection and Maintenance General Inspection and Maintenance Engine Coolant ReplacementDo not remove the radiator cap when the engine is hot Coolant Level Inspection Coolant Replacement Fill Radiator Engine To specified level Radiator CAP Opening Pressure Inspection Radiator CAP InspectionRadiator cap opening pressure 110 kPa 1.1 kg/cm2, 15.6 psi Cooling System Inspection Cooling System InspectionStandard pressure KPa 1.8 kg/cm2, 25.6 psi Clutch Adjustment Throttle Cable Adjustment Throttle Lubrication HOT Starter Lever AdjustmentHot starter lever free play adjustment steps Hot starter lever free play a 3 ~ 6 mm 0.12 ~ 0.24 AIR Filter Cleaning AIR Filter Cleaning Insp ADJ Engine OIL Level Inspection Engine OIL Level Inspection Recommended engine oil classi- fication When the oil tank is empty, never start the engineRecommended oil API Standard Engine OIL Replacement Engine OIL Replacement Replacement steps Oil filter cover 10 Nm 1.0 m kg, 7.2 ft lb Pilot Screw Adjustment Pilot Screw Adjustment Adjustment steps Idle Speed AdjustmentValve Clearance Adjustment Valve Clearance Adjustment Mm increments Pad range Pad Availability Increments 20 mm40 mm Example Last digit of pad Rounded valueBolt camshaft cap 10 Nm 1.0 m kg, 7.2 ft lb Insp ADJ Intake Exhaust Spark Arrester Cleaning For USA Chassis CHASSIS/BRAKE System AIR BleedingBrake System AIR Bleeding Brake lever position adjustment steps Front Brake AdjustmentFront Brake Adjustment Locknut Nm 0.5 m kg, 3.6 ft lb Rear Brake Adjustment Front Brake PAD Inspection and Replacement Do not reuse the drained brake fluid Front Brake PAD Inspection and ReplacementBleed screw Nm 0.6 m kg, 4.3 ft lb Pad pin plug Nm 0.3 m kg, 2.2 ft lb Rear Brake PAD Inspection and ReplacementRear Brake PAD Inspection and Replacement Brake pad thickness a Standard Limit Mm 0.25 Mm 0.04 Pad pin 18 Nm 1.8 m kg, 13 ft lb Rear Brake PAD Insulator Inspection Brake Fluid Level Inspection Drive Chain Inspection Sprockets INSPECTION/DRIVE Chain InspectionSprockets Inspection Drive chain length 10 links Limit 150.1 mm 5.91 Drive Chain Inspection Drive chain slack adjustment steps Drive Chain Slack AdjustmentDrive Chain Slack Adjustment Drive chain slack 40 ~ 50 mm 1.6 ~ 2.0 Locknut 16 Nm 1.6 m kg, 11 ft lb Front Fork OIL Seal and Dust Seal CleaningAxle nut 125 Nm 12.5 m kg, 90 ft lb Front Fork Inspection Front Fork Rebound Damping Force Adjustment Front Fork Internal Pressure Relieving Front Fork Compression Damping Force Adjustment Standard position 10 clicks out Clicks out Rear Shock Absorber Inspection Rear Shock Absorber Inspection 246 mm 9.69 240.5 ~ 258.5 mm Rear Shock Absorber Spring Preload Adjustment47 ~ 10.18 Rear Shock Absorber Rebound Damping Force Adjustment Standard position About 9 clicks out *About 10 clicks out Rear Shock Absorber LOW Compression Damping Force Adjustment Standard position About 6 clicks out *About 13 clicks out EC36d000 Spokes Inspection and Tightening Tire Pressure CheckStandard tire pressure KPa 1.0 kgf/cm2, 15 psi Wheel Inspection Steering ring nut adjustment steps Steering Head Inspection and AdjustmentSteering Head Inspection Adjustment Ring nut wrench YU-33975/90890-01403 Cautio N Lubrication Lubrication Spark Plug Inspection ELECTRICAL/SPARK Plug InspectionElectrical Spark plug gap ~ 0.8 mm 0.028 ~ 0.031 Ignition Timing Check Ignition Timing Check Keep Batteries and Electrolyte OUT of Reach of Children Battery Inspection and ChargingBattery Inspection and Charging First AID in Case of Bodily Contact External Measurement steps Do not quick charge a battery Example Insp ADJ Charging method using a variable voltage charger Charging method using a constant voltage charger Recommended lubricant Lithium soap base grease Fuse InspectionFirst, connect the positive lead 1, then the negative lead Fuse Inspection Items Amperage ’ty Rating Replacing the Headlight BulbsReplacing the Headlight Bulbs Adjusting the Headlight Beams Adjusting the Headlight Beams SEAT, Fuel Tank and Side Covers SEAT, Fuel Tank and Side Covers Removal Removal Points Side cover Exhaust Pipe and Silencer Exhaust Pipe Silencer Removal Assembly and Installation Exhaust pipe and silencer Exhaust pipe and silencer Radiator Radiator Removal Handling Note Assembly and Installation RadiatorRadiator Install Radiator breather hose Radiator right Carburetor Carburetor Removal Carburetor Disassembly Carburetor Disassembly ENG Pilot screw Carburetor Jet needle Needle valveThrottle valve Standard clip position No.4 Groove Float Measurement and adjustment stepsStarter plunger Accelerator pump Assembly and Installation CarburetorAir cut valve ENG ENG Pilot screw 4 turns out example 2 turns out example ENG Carburetor ENG Accelerator pump timing adjustment Adjustment stepsCarburetor installation Throttle valve height Mm 0.122 Tighten Screw air cleaner joint Cylinder Head Cover CamshaftsCylinder Head Cover Removal Camshafts Removal Camshaft Runout camshaft Less than 0.03 mm 0.0012 Bolt camshaft cap 10 Nm 1.0 m kg, 7.2 ft lb Decompression system Assembly and InstallationInstallation steps Timing chain tensioner CA U TI on Bolt camshaft cap Bolt timing chain tensioner Camshafts ENGTensioner cap bolt Cylinder Head Cylinder Head Removal Cylinder head Bolts cylinder head 1st 30 Nm 3.0 m kg, 22 ft lb 20 Nm 2.0 m kg, 14 ft lb Bolts cylinder head2nd Final Valves and Valve Springs Valves and Valve Springs Removal Valve spring compressor YM-4019/90890-04019 Valve ENG Runout limit 01 mm 0.0004 Lapping steps Valve spring Yellow Combination of cylinder head and valve lifterCombination Cylinder head mark Valve lifter mark Color Black CA UT ION Cylinder and Piston Cylinder and Piston Removal Do not use a hammer to drive the piston pin out Piston ring PistonPiston pin puller YU-1304/90890-01304 Cylinder and piston 2nd step Cylinder bore C 95.00 ~ 95.01 mm 7402 ~ 3.740605 mm 0.002 Piston size P Standard End gap Standard Limit 2nd ring 020 ~ 0.055 mm 12 mm 0008 ~ 0.002220 ~ 0.50 mm 01 ~ 0.02 Piston pin Inside diameter piston 18.004 ~ 18.015 mm 0.7088 ~ 0.7093 Cylinder Clutch Clutch Removal ENG Clutch holding tool YM-91042/90890-04086 Clutch housing and bossClutch boss Primary driven gear Warp limit Mm 0.004 Push lever Friction plateClutch plate Push rod Assembly and Installation Push lever Clutch ENG Install Clutch spring Bolt clutch spring OIL FILTER, Water Pump and Crankcase Cover Right OIL FILTER, Water Pump and Crankcase Cover RightOIL FILTER, Water Pump Crankcase Cover Right Removal ENG Impeller shaft Oil seal Bearing Crankcase cover right Water pump housing Kick crank Oil filter Balancer Balancer Removal Balancer drive gear and balancer driven gear Balancer Balancer, balancer drive gear and balancer driven gear OIL Pump Removal and DIS Assembly OIL Pump ENG Assembly and Installation Oil pump Oil pump Bolt oil pump assembly L = 25 mm 0.98 Kick Axle and Shift Shaft Kick Axle and Shift Shaft Removal ENG Segment Kick axle assemblyShift guide and shift lever assembly Kick axle and ratchet wheel Shift shaft Assembly and Installation SegmentStopper lever Install Torsion spring Stopper lever Bolt stopper lever EC4C5301 Kick idle gear AC Magneto and Starter Clutch AC Magneto and Stator Removal ENG AC magneto RotorRotor puller YM-04141/90890-04141 Woodruff key Assembly and Installation AC magneto and starter clutch Starter clutch Quick gasket ACC-QUICK-GS-KT Yamaha Bond No 90890-85505 Install Bolt starter clutch Install Engine guard Clamp Bolt engine guard front Engine Removal Engine Removal ENG ENG Drive sprocket Engine removal Assembly and Installation Engine installation Brake pedal Install Ring 1 New Dowel pin Oil hose Bolt oil hose Crankcase and Crankshaft Crankcase Separation ENG Crankcase Bearing Crankcase Bearing Removal Crankcase Separation steps Crankcase separating tool YU-1135-A/90890-01135 CrankshaftTiming chain and timing chain guide Oil delivery pipe Assembly and Installation Crankshaft bearing Do not use a hammer to drive in the crank- shaft Quick gasket ACC-QUICK-GS-KT Yamaha Bond No Bolt crankcase TRANSMISSION, Shift CAM and Shift Fork TRANSMISSION, Shift CAM and Shift ForkTRANSMISSION, Shift CAM Shift Fork Removal Shift fork, shaft cam and transmission Gears Assembly and Installation Transmission Shift fork, shift cam and segment ENG ENG Front Wheel Front Wheel and Rear Wheel ChasFront Wheel and Rear Wheel Front Wheel Removal Rear Wheel Rear Wheel Removal Wheel bearing if necessary Rear wheelWheel Do not attempt to straighten a bent axle Wheel axleWheel axle bending limit 0.5 mm 0.020 Brake disc Caacuhtutionng Front wheel 105 Nm 10.5 m · kg, 75 ft · lb Tighten Bolt axle holder Tighten the nuts in stage, using a crisscross pattern Front Wheel and Rear Wheel Chas Adjust Drive chain slack a Front Brake Front Brake and Rear Brake ChasFront Brake and Rear Brake Front Brake Removal Rear Brake Rear Brake Removal Caliper Disassembly Caliper Disassembly Master Cylinder Disassembly Master Cylinder Disas Sembly Brake fluid Caliper piston Master cylinder Piston seal kitUse only new brake fluid Caliper Brake hose Always use new piston seals and dust seals Front caliper Always use new copper washers Rear caliper Master cylinder kit Front master cylinder Caauchtutionng Rear master cylinder Front brake hose Cauachttuniong Install Brake hose holder Screw brake hose holder Rear Diaphragm Master cylinder cap Bolt master cylinder cap Front Fork Front Fork ChasFront Fork Removal Front Fork Disassembly Front Fork Disassembly Cap bolt Oil seal removal steps Inner tubeTake care not to scratch the inner tube Damper rod Inner tube bending limit 0.2 mm 0.008 Base valveFork spring Outer tube Assembly and Installation Front fork assembly Front Fork Chas Fork seal driver YM-01442/90890-01442 Recommended oil Suspension oil Front Fork Chas Front Fork Chas Installation Front fork top end standard a Zero mm Zero Tighten Pinch bolt handle crown Handlebar Handlebar ChasHandlebar Removal Grip Handlebar Assembly and Installation Handlebar Install Cover grip cap Cover throttle cable cap Hot starter lever holder Bolt hot starter lever holder Handlebar Chas Steering Steering ChasSteering Removal Steering Chas Take care not to damage the steering shaft thread Ring nutBearing lower Ball race Bearing and ball race Under bracket Install Plain washer Ring nut Install Trip meter Bolt trip meter Swingarm Swingarm ChasSwingarm Removal Swingarm Disassembly Swingarm Disassembly Swingarm Relay arm Connecting rod Bearing and oil seal Installed depth of bearings a 5 mm 0.20 Installed depth of bearings a 5 mm 0.20 Swingarm 80 Nm 8.0 m · kg, 58 ft · lb Tighten Nut relay arm Bolt support cover r= 10 mm 0.39 Rear Shock Absorber Rear Shock Absorber ChasRear Shock Absorber Removal Rear Shock Absorber Chas Rear Shock Absorber Chas EC586000 Rear shock absorber Installed depth of the bearing a 4 mm 0.16 Spring rear shock absorber Spring length installed a Standard Extent Adjustment Bolt rear frame lower Rear Shock Absorber Chas Wiring Diagram Electrical Components and Wiring DiagramColor Code MAP-CONTROLLED CDI Unit Function of Component Ignition System Inspection Steps COUPLERS, Leads and Ignition Coil Connection Inspection Ignition System Elec +Spark GAP Test Engine Stop Button Inspection OFF Main Switch InspectionIgnition Coil Inspection AC Magneto Inspection Neutral Switch InspectionCDI Unit Inspection Electric Starting System Starting Circuit CUT-OFF System Operation Inspection Steps Starting Circuit CUT-OFF Relay Inspection Couplers and Leads Connection InspectionStarter Motor Operation Tor position Starter Relay Inspection Clutch Switch InspectionPull Free Electric Starting System Elec + Remove the diode from wire harnessStart Switch Inspection Diode Inspection Starter Motor Removal Starter MotorStarter Motor Disassem BLY Elec Min. commutator diameter 16.6 mm 0.65 Inspection and RepairMica undercut 1.5 mm 0.06 Be careful not to damage the brush during installation AssemblyMin. brush length Mm 0.14 New Charging System DCV-20 Charging Voltage InspectionTester + lead → Red lead Tester lead → Black lead 000 r/min TPS Throttle Position Sensor System TPS Throttle Position Sensor System Elec + TPS Coil Inspection TPS Replacement and Adjustment Tester + lead → Yellow lead Tester lead → Black lead 58 ~ 0.78 DCV Tester + lead → Blue lead 1 Tester lead → Black/Blue lead TPS Input Voltage Inspection~ 6 DCV-20 Lighting System No continuous while being → Replace Lights Switch InspectionTester + lead → Yellow lead Tester lead → Blue lead RECTIFIER/REGULATOR Inspection Setting Carburetor setting Humidity Effects of the setting parts on the throttle valve opening Setting T U NMain system Standard main jet #150 #160 Main jet adjustmentPilot system Effects of changing the main jet reference Effects of adjusting the pilot screw reference Pilot screw adjustmentStandard pilot Screw position Example Jet needle groove position adjustment Pilot jet adjustmentEffects of adjusting the pilot jet reference Standard pilot jet #45 #48 Obdut Obduq Jet needle adjustmentStandard jet needle Effects of changing the jet needle reference #DUV STD#DUS #DUW Examples of carburetor setting depending on symptom Selection of the secondary reduction ratio Sprocket Standard secondary reduction ratio 50/14 For CDN, EUROPE, AUS, NZ and ZA 5NG-17460-009383E-14215 Size Part number Front fork setting Change in level and characteristics of fork oil Spring preload adjustment Setting of spring after replacement Setting Mark Part NumberSpring Rate Choosing set length Rear suspension settingStandard ﬁgure 90 ~ 100 mm 3.5 ~ 3.9 EC72G001 Setting Adjustment b Rear shock absorber setting partsSpring Free Extent Suspension setting One passenger is astride seat Printed on Recycled Paper Shingai Iwata Shizuoka Japan