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MODELS COVERED: YZ100 (1976-1983)
YZ125 (1976-1984)
YZ175 (1976)
YZ250 (1976-1984)
YZ400 (1976-1979)
YZ465 (1980-1981)
YZ490 (1982-1984) This Yamaha vintage motorcycle manual is 352 pages.
QUICK REFERENCE DATA
CHAPTER ONE / GENERAL INFORMATION
Manual organization / Service hints / Torque specifications / Safety first / Special tips / Mechanic's tips / Parts replacement / Expendable supplies / Tools / What year is it? / Serial numbers / Specifications
CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Troubleshooting instruments / Emergency troubleshooting / Engine starting / Engine performance / Engine noises / Excessive vibration / Two-stroke pressure test / Front suspension and steering / Brake problems / Specifications
CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Pre-checks / Tires and wheels / Lubricants / Cleaning solvent / Periodic lubrication / Engine lubrication / Transmission oil checking and changing / Front fork oil change / Front fork air pressure / Periodic maintenance / Monoshock adjustment / Drive chain adjustment / Clutch adjustment / Throttle adjustment / Air cleaner service / Engine tune-up / Cylinder head nuts torque / Spark plug / Magneto / Ignition timing / Idle speed adjustment / Decarbonizing engine and exhaust system / Storage / Specifications
CHAPTER FOUR / ENGINE
Engine principles / Engine lubrication / Engine cooling / Servicing engine in frame / Engine / Cylinder head / Cylinder / Piston, piston pin and piston rings / Magneto / Reed valve assembly / Crankcase and crankshaft / Kickstarter / Service and adjustment / Specifications
CHAPTER FIVE / CLUTCH AND TRANSMISSION
Clutch / Clutch cable / Clutch release (push lever) mechanism / External shift mechanism / Transmission and internal shift mechanism / Specifications
CHAPTER SIX / FUEL AND EXHAUST SYSTEMS
Air cleaner / Carburetor operation / Carburetor service / Carburetor adjustments / Fuel shutoff valve / Fuel tank / Fuel filter / Exhaust system / Exhaust system decarbonizing / Exhaust system repair / Specifications
CHAPTER SEVEN / ELECTRICAL SYSTEM
Capacitor discharge ignition / Spark plug / Magneto-outer rotor (type I) / Magneto-inner rotor (type II, III, IV) / Ignition coil / Engine kill switch / Specifications
CHAPTER EIGHT / FRONT SUSPENSION AND STEERING
Front wheel / Front hub / Wheels / Tire changing / Tire repairs / Handlebar / Steering head / Front fork / Specifications
CHAPTER NINE / REAR SUSPENSION
Rear wheel / Rear hub / Drive sprocket / Drive chain / Wheel balancing / Tire changing and repairs / Rear swing arm / Rear monoshock (DeCarbon Monocross System) / Rear suspension (monocross type) / Specifications
CHAPTER TEN / BRAKES
Front brake / Rear brake / Front brake cable / Rear brake pedal assembly / Specifications
CHAPTER ELEVEN / FRAME AND REPAINTING
Kickstand (sidestand) / Footpegs / Frame / Specifications
SUPPLEMENT / 1981 AND LATER SERVICE INFORMATION
INDEX
WIRING DIAGRAMS |
