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MODELS COVERED: YZ125 (1994-2001) This Yamaha motorcycle manual is 456 pages.
QUICK REFERENCE DATA
CHAPTER ONE / GENERAL INFORMATION
Manual organization / Notes, cautions and warnings / Safety first / Cleaning parts / Handling gasoline safely / Service hints / Serial numbers / Warning labels / Torque specifications / Fasteners / Lubricants / Sealant, cements and cleaners / Threadlocking compound / Basic hand tools / Precision measuring tools / Test equipment / Special tools / Mechanics' tips / Ball bearing replacement / Seals / Specifications
CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Starting the engine / Starting difficulties / Engine performance / Engine / Engine noises / Two-stroke leak down test / Fuel system / Electrical troubleshooting / Test equipment / Ignition system / Clutch / External shift mechanism and transmission / Kickstarter / Drive train noise / Front suspension and steering / Rear suspension / Frame noise / Brakes / Specifications
CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Service intervals / Tune-up / Pre-ride inspection / Engine lubrication / Transmission oil / Air filter / Engine compression check / Ignition timing / Spark plug / Control cable lubrication / Throttle cable adjustment / Specifications
CHAPTER FOUR / ENGINE TOP END
Exhaust system / Cylinder head / Cylinder / Exhaust valve / Exhaust valve service cleaning decarbonizing / Piston, rings, pin and connecting rod / Reed valve assembly / Engine break-in / Specifications
CHAPTER FIVE / ENGINE BOTTOM END
Removal installation / Countershaft seal replacement / Left side main bearing seal / Crankcase and crankshaft / Specifications
CHAPTER SIX / CLUTCH
Clutch cover / Clutch release lever / Right crankcase cover / Exhaust valve governor / Clutch service / Primary drive gear / Kickstarter and idle gear / External shift mechanism / Clutch cable / Specifications
CHAPTER SEVEN / TRANSMISSION AND INTERNAL SHIFT MECHANISM
Troubleshooting / Transmission overhaul inspection / Internal shift mechanism / Specifications
CHAPTER EIGHT / FUEL SYSTEM
Carburetor / Flat level adjustment / Carburetor rejetting / Fuel tank / Fuel valve / Throttle cable / Specifications
CHAPTER NINE / IGNITION SYSTEM
Capacitor discharge ignition / Flywheel / Stator coils / CDI unit / Ignition coil / Engine stop switch / Ignition timing / Specifications
CHAPTER TEN / LIQUID COOLING SYSTEM
Hoses and clamps / Inspection / Radiator / Water pump / Specifications
CHAPTER ELEVEN / WHEELS, TIRES AND DRIVE CHAIN
Hubs / Rim and spoke service / Drive chain / Sprocket / Specifications
CHAPTER TWELVE / FRONT SUSPENSION AND STEERING
Handlebar / Steering head / Front fork oil change / Front fork / Front fork service / Front fork adjustment / Specifications
CHAPTER THIRTEEN / REAR SUSPENSION
Shock absorber / Shock linkage / Rear swing arm / Shock linkage / Rear swing arm / Connecting rod and relay arm / Rear suspension adjustment / Specifications
CHAPTER FOURTEEN / BRAKES
Brake pads / Caliper / Master cylinder / Brake hose / Brake disc / Draining brake fluid / Brake bleeding / Rear brake pedal / Specifications
CHAPTER FIFTEEN / BODY
Seat / Side covers / Radiator covers / Subframe / Specifications
SUPPLEMENT / 2000-2001 SERVICE INFORMATION
INDEX
WIRING DIAGRAMS
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