Yamaha YFM250 Timberwolf (1989 - 1991)

This Yamaha Timberwolf ATV Manual is 536 pages.

QUICK REFERENCE DATA

CHAPTER ONE / GENERAL INFORMATION
Manual organization / Notes, warnings and cautions / Safety first / Service hints / Washing the vehicle / Torque specifications / Lubricants / Sealant, cements and cleaners / Threadlocking compound / Expendable supplies / Serial numbers / Warning labels / Basic hand tools / Precision measuring tools / Special tools / Fabricating tools / Mechanic's tips / Ball bearing replacement / Seals / Riding safely / Storage / Specifications

CHAPTER TWO / TROUBLESHOOTING
Operating requirements / Troubleshooting instruments / Starting the engine / Starting difficulties / Poor idle speed / Poor medium and high speed performance / Starting system / Charging system / Ignition system / Lighting system / Cooling system testing / Fuel system / Engine overheating / Engine / Engine overheating / Engine noises / Engine leak down test / Clutch / Transmission / Drive train Noise / Handling / Frame noise / Brakes

CHAPTER THREE / LUBRICATION, MAINTENANCE AND TUNE-UP
Pre-ride check list / Maintenance service schedule intervals / Periodic lubrication / Engine oil and filter change / Oil flow inspection / Front differential gearcase oil change / Rear differential drive gearcase oil change / Control cable lubrication / Unscheduled lubrication / Periodic maintenance / Unscheduled maintenance / Tune-up / Valve clearance / Cylinder compression / Spark plug / Air filter / Ignition timing / Pilot air screw adjustment / Idle speed adjustment / Specifications

CHAPTER FOUR / ENGINE TOP END
Engine principles / Cylinder head / Camshaft and rocker arms / Camshaft chain / Chain guides / Valves and valve components / Cylinder block / Piston and piston rings / Specifications

CHAPTER FIVE / ENGINE LOWER END
Servicing engine in frame / Subtransmission and reverse gear assembly / Middle driven and reverse gear assembly / Transfer gear assembly / Middle drive gear / Transmission drive select lever / Oil pump / Balancer driven gear / Magneto stator and stator housing / Magneto rotor and starter clutch / Right-hand crankcase spacer / Crankcase and crankshaft / Recoil starter / Break-in procedure / Specifications

CHAPTER SIX / CLUTCH AND EXTERNAL SHIFT MECHANISM
Clutch cover / Clutch release lever mechanism / Clutch assemblies / One-way clutch inspection / External shift mechanism / Specifications

CHAPTER SEVEN / TRANSMISSION AND INTERNAL SHIFT MECHANISM
Transmission troubleshooting / Transmission overhaul / Internal shift mechanism / Specifications

CHAPTER EIGHT / FUEL AND EXHAUST SYSTEMS
Carburetor adjustments / Throttle cable replacement / Choke cable replacement / Throttle lever housing / Fuel tank / Fuel shutoff valve / Air filter air box / Exhaust system / Specifications

CHAPTER NINE / ELECTRICAL SYSTEM
Basic information / Charging system / Voltage regulator/rectifier / Capacitor discharge ignition / Ignition coil / CDI magneto (stator source and pickup coils) / Starting system / Starter relay / Lighting system / Indicator light system / Instrument panel / Handlebar cover and indicator lights / Switch / Relays / Fuses / Specifications

CHAPTER TEN / FRONT SUSPENSION AND STEERING
Front wheel / Front hub brake drum / Front suspension / Shock absorber / Steering knuckle / Control arm / Control arm bushing / Ball joint / Handlebar / Tie rods / Steering shaft / Tires and wheels / Specifications

CHAPTER ELEVEN / FRONT DRIVE MECHANISM FOUR-WHEEL DRIVE
Front drive axle / Front differential gearcase / Front drive shaft / Specifications

CHAPTER TWELVE / REAR SUSPENSION AND FINAL DRIVE
Rear wheels / Rear hub / Rear hub brake drum / Rear axle / Final drive unit and short drive shaft / Tire changing and tire repairs / Shock absorber / Swing arm / Specifications

CHAPTER THIRTEEN / BRAKES
Front brake drum / Rear brake disc / Rear drum brake hub / Rear brake pedal / Specifications

CHAPTER FOURTEEN / BODY
Seat / Front guard / Front bumper / Front carrier/rack / Rear carrier/rack / Rear bumper / Rear handle / Fuel tank cover assembly / Front fender / Front fender / Rear fender / Footrests / Specifications

INDEX

WIRING DIAGRAMS

Models covered:
1992 1993 1994 1995 1996 1997 1998 Yamaha YFB250 YFB 250
1994 1995 1996 1997 1998 1999 2000 Yamaha YFB250FW YFB250 FW YFB 250 FW
1989 1990 1991 Yamaha YFM250 YFM 250

Clymer Manuals Yamaha YFM250 Timberwolf Manual
Clymer Manuals Yamaha YFB250 Timberwolf Manual
Clymer Manuals Yamaha YFB250FW Timberwolf Manual

YFM250 Timberwolf (1989-1991)
YFB250 Timberwolf (1992-1998)
YFB250FW Timberwolf (1994-2000)