QUICK REFERENCE DATA
GENERAL INFORMATION
TROUBLESHOOTING
Spark test / Leak down test
LUBRICATION, MAINTENANCE AND TUNE-UP
Maintenance schedule intervals / Pre-ride inspection / Engine oil and filter / Air filter / Ignition timing / Spark plug / Engine compression check / Engine top end inspection / Valve clearance / Flywheel nut / Engine break-in / Specifications
ENGINE
Exhaust system / Cylinder head cover / Camshafts and cam chain tensioner / Cam chain and guides / Cylinder head / Valve lifters and shims / Valves / Cylinder / Piston and rings / Removal installation / Crankcase / Crankcase seal and bearing replacement / Oil pump drive gear pivot shaft / Crankshaft / Specifications
CLUTCH, OIL PUMP, KICKSTARTER AND EXTERNAL SHIFT MECHANISM
Torque specifications / Right crankcase cover / Clutch cover / Clutch push lever / Balancer and primary drive gears / Oil pump / Kickstarter and kick idle gear / External shift mechanism / Clutch cable / Specifications
TRANSMISSION AND INTERNAL SHIFT MECHANISM
Mainshaft / Countershaft / Inspection / Shift drum and forks / Specifications
FUEL SYSTEM
Carburetor / Float height adjustment / Carburetor rejetting / Fuel tank / Fuel shutoff valve / Throttle cable replacement / Hot start cable / Specifications
ELECTRICAL SYSTEM
Left crankcase cover / Flywheel and stator / Stator coils / Stator coil / Flywheel and starter clutch / Ignition coil / Ignition coil / Capacitor discharge ignition unit CDI / Ignition component testing / Ignition timing / Throttle position sensor / Lighting system / Lighting system testing / Voltage regulator / Battery / Charging system / Starter / Starter relay switch / Starting circuit cut-off relay / Diode / Switches / Fuse / Specifications
COOLING SYSTEM
Inspection / Water pump seal inspection / Pressure test / Radiator / Radiator pipe / Coolant reserve tank / Water pump / Specifications
WHEELS, TIRES AND DRIVE CHAIN
Front rear wheel / Front rear hubs / Wheel service / Drive chain / Sprocket replacement / Specifications
FRONT SUSPENSION AND STEERING
Handlebar / Grips / Steering head / Steering play check and adjustment / Steering head bearing races / Front fork / Fork oil change and oil level adjustment / Fork adjustment / Specifications
REAR SUSPENSION
Shock absorber / Shock linkage / Swing arm / Rear suspension adjustment / Specifications
BRAKES
Brake pads / Front brake caliper / Front rear master cylinder / Rear brake caliper / Brake pedal / Brake disc / Draining brake fluid / Brake bleeding / Specifications
BODY
Seat / Side covers / Radiator shrouds / Front fender / Rear fender / Footpegs / Subframe / Odometer / Sidestand / Specifications
INDEX
WIRING DIAGRAMS
Models covered:
2001 2002 2003 WR250F WR250 WR 250F 250 F
2001 2002 2003 YZ250F YZ250 YZ 250F 250 F
