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YFM80 Moto-4 (1985-1988)
YFM80 Badger (1992-2001)
YFM80 Raptor (2002-2008)
QUICK REFERENCE DATA
CHAPTER ONE / GENERAL INFORMATION
Manual organization / Warnings, cautions and notes / Safety / Serial numbers / Fasteners / Shop supplies / Basic tools / Precision measuring tools / Decimal place values / Electrical system fundamentals / Special tools / Basic service methods / Storage / Specifications
CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Starting the engine / Engine will not start / Engine is difficult to start / Poor idle speed performance / Poor medium to high speed performance / Starting system / Charging system / Ignition system / Ignition system diagnosis / Fuel system / Engine overheating / Engine / Engine noises / Engine leak down test / Clutch / Transmission / Handling / Frame noise / Brakes
CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Pre-ride checklist / Periodic lubrication / Engine oil change / Oil strainer screen / Final drive oil change / Control cable lubrication / Air filter / Cam chain adjustment / Valve clearance / Compression test / Spark plug / Spark arrestor / Ignition timing / Idle speed / Throttle lever adjustment / Speed limiter / Clutch / Chassis maintenance / Specifications
CHAPTER FOUR / ENGINE TOP END
Engine cooling / Engine removal / Intake manifold / Cylinder head / Cylinder / Rocker arm and camshaft / Valves and valve components / Piston / Piston rings / Specifications
CHAPTER FIVE / ENGINE LOWER END
Engine break-in / Engine removal / Engine installation / Oil pump and oil strainer / CDI magneto / Middle driven gear / Crankcase / Driven gear shim selection / Transmission / Crankshaft / Specifications
CHAPTER SIX / CLUTCH AND DRIVE GEAR
Clutch / Drive gear and starter clutch / Specifications
CHAPTER SEVEN / TRANSMISSION AND SHIFTER
Transmission / Shift shaft and stopper lever / Specifications
CHAPTER EIGHT / FUEL AND EXHAUST SYSTEMS
Carburetor / Carburetor adjustments / Fuel tank / Exhaust / Specifications
CHAPTER NINE / ELECTRICAL SYSTEM
Electrical component replacement / Starting system / Ignition system / Ignition coil test / Pickup coil test / Source coil test / Main switch test / Engine top switch test / Charging system / Specifications
CHAPTER TEN / FRONT SUSPENSION, WHEELS AND TIRES
Front wheel / Front wheel bearings / Front shock absorber and lower arm / Wheel alignment / Handlebar / Steering shaft / Steering knuckle / Tie rod / Tires and wheel / Specifications
CHAPTER ELEVEN / REAR AXLE, REAR SUSPENSION AND FINAL DRIVE
Rear wheel and wheel hub / Rear shock absorber / Rear swing arm and drive shaft / Final drive/rear hub / Final drive and axle inspection / Specifications
CHAPTER TWELVE / BRAKES
Front brake lever free play / Front brake / Rear brake / Specifications
CHAPTER THIRTEEN / BODY AND CHASSIS
Front fender / Front bumper / Rear fender / Swing arm guard / Specifications
INDEX
COLOR WIRING DIAGRAMS
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