TROUBLESHOOTING
9-3
●
Clogged air filter element
Chassis
1. Brake (s)
●
Dragging brake
Electrical system
1. Spark plug (s)
●
Incorrect spark plug gap
●
Incorrect spark plug heat range
2. Ignition system
●
ECU failure
●
Faulty radiator fan motor relay
●
Faulty coolant temperature sensor
EAS28610
OVERCOOLING
Cooling system
1. Thermostat
●
Thermostat stays open
EAS28620
POOR BRAKING PERFORMANCE
●
Worn brake pad
●
Worn brake disc
●
Air in hydraulic brake system
●
Leaking brake fluid
●
Defective master cylinder kit
●
Faulty brake caliper kit
●
Faulty brake caliper seal
●
Loose union bolt
●
Damaged brake hose
●
Oil or grease on the brake disc
●
Oil or grease on the brake pad
●
Incorrect brake fluid level
EAS28660
FAULTY FRONT FORK LEGS
Leaking oil
●
Bent, damaged or rusty inner tube
●
Cracked or damaged outer tube
●
Improperly installed oil seal
●
Damaged oil seal lip
●
Incorrect oil level (high)
●
Loose damper rod assembly bolt
●
Damaged damper rod assembly bolt copper
washer
●
Cracked or damaged cap bolt O-ring
Malfunction
●
Bent or damaged inner tube
●
Bent or damaged outer tube
●
Damaged fork spring
●
Bent or damaged damper rod
●
Incorrect oil viscosity
●
Incorrect oil level
EAS28690
UNSTABLE HANDLING
1. Handlebar
●
Bent or improperly installed handlebar
2. Steering head components
●
Improperly installed upper bracket
●
Improperly installed lower bracket
(improperly tightened ring nut)
●
Bent steering stem
●
Damaged ball bearing or bearing race
3. Front fork leg (s)
●
Uneven oil levels (both front fork legs)
●
Unevenly tensioned fork spring (both front
fork legs)
●
Broken fork spring
●
Bent or damaged inner tube
●
Bent or damaged outer tube
4. Swingarm
●
Worn bearing or bushing
●
Bent or damaged swingarm
5. Rear shock absorber assembly (-ies)
●
Faulty rear shock absorber spring
●
Leaking oil or gas
6. Tire (s)
●
Uneven tire pressures (front and rear)
●
Incorrect tire pressure
●
Uneven tire wear
7. Wheel (s)
●
Incorrect wheel balance
●
Broken or loose spoke
●
Damaged wheel bearing
●
Bent or loose wheel axle
●
Excessive wheel runout
8. Frame
●
Bent frame
●
Damaged steering head pipe
●
Improperly installed bearing race
EAS28710
FAULTY LIGHTING OR SIGNALING SYSTEM
Headlight does not come on
●
Fuse open circuit
●
Wrong headlight bulb
●
Too many electrical accessories
●
Hard charging
●
Incorrect connection
●
Improperly grounded circuit
●
Poor contacts (main or light switch)
●
Burnt-out headlight bulb
Headlight bulb burnt out
●
Wrong headlight bulb
●
Faulty battery
●
Faulty rectifier/regulator
●
Improperly grounded circuit
Summary of Contents for WR250R
Page 1: ...SERVICE MANUAL WR250RX C 2008 32C 28197 10 WR250XX C LIT 11616 21 66 ...
Page 2: ......
Page 8: ......
Page 39: ...ELECTRICAL SPECIFICATIONS 2 14 Spare fuse 15 0 A Spare fuse 10 0 A Spare fuse 7 5 A ...
Page 49: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 24 ...
Page 52: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Page 54: ...COOLING SYSTEM DIAGRAMS 2 29 EAS20420 COOLING SYSTEM DIAGRAMS 8 5 1 2 3 4 6 7 9 ...
Page 56: ...CABLE ROUTING 2 31 EAS20430 CABLE ROUTING ...
Page 58: ...CABLE ROUTING 2 33 ...
Page 60: ...CABLE ROUTING 2 35 ...
Page 62: ...CABLE ROUTING 2 37 ...
Page 64: ...Front rear brake hose 2 39 Front rear brake hose ...
Page 66: ...Throttle body 2 41 Throttle body ...
Page 68: ...Canister for California 2 43 Canister for California 5mm 0 20 in 4 5 ...
Page 70: ...Canister for California 2 45 ...
Page 106: ...ELECTRICAL SYSTEM 3 34 a b a b ...
Page 107: ...ELECTRICAL SYSTEM 3 35 ...
Page 108: ...ELECTRICAL SYSTEM 3 36 ...
Page 116: ...FRONT WHEEL 4 6 1 ...
Page 229: ...GENERATOR AND STARTER CLUTCH 5 55 1 2 ...
Page 244: ...TRANSMISSION 5 70 ...
Page 254: ...WATER PUMP 6 9 ...
Page 258: ...FUEL TANK 7 3 1 ...
Page 263: ...THROTTLE BODIES 7 8 ...
Page 264: ...AIR INDUCTION SYSTEM 7 9 EAS27040 AIR INDUCTION SYSTEM 2 1 3 4 ...
Page 271: ......
Page 272: ...IGNITION SYSTEM 8 1 EAS27090 IGNITION SYSTEM EAS27100 CIRCUIT DIAGRAM ...
Page 276: ...ELECTRIC STARTING SYSTEM 8 5 EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM ...
Page 282: ...CHARGING SYSTEM 8 11 EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM ...
Page 283: ...CHARGING SYSTEM 8 12 1 AC magneto 2 Rectifier regulator 4 Battery 5 Main fuse ...
Page 285: ...CHARGING SYSTEM 8 14 ...
Page 286: ...LIGHTING SYSTEM 8 15 EAS27240 LIGHTING SYSTEM EAS27250 CIRCUIT DIAGRAM ...
Page 289: ...LIGHTING SYSTEM 8 18 ...
Page 290: ...SIGNALING SYSTEM 8 19 EAS27270 SIGNALING SYSTEM EAS27280 CIRCUIT DIAGRAM ...
Page 295: ...SIGNALING SYSTEM 8 24 ...
Page 296: ...COOLING SYSTEM 8 25 EAS27300 COOLING SYSTEM EAS27310 CIRCUIT DIAGRAM ...
Page 299: ...COOLING SYSTEM 8 28 ...
Page 300: ...FUEL INJECTION SYSTEM 8 29 EAS27330 FUEL INJECTION SYSTEM EAS27340 CIRCUIT DIAGRAM ...
Page 326: ...FUEL PUMP SYSTEM 8 55 EAS27580 FUEL PUMP SYSTEM EAS27590 CIRCUIT DIAGRAM ...
Page 329: ...FUEL PUMP SYSTEM 8 58 ...
Page 332: ...ELECTRICAL COMPONENTS 8 61 2 3 4 9 5 10 14 13 1 6 7 11 12 15 8 ...
Page 334: ...ELECTRICAL COMPONENTS 8 63 EAS27980 CHECKING THE SWITCHES 7 9 8 11 10 4 2 3 5 6 1 ...
Page 358: ...TROUBLESHOOTING 9 5 ...
Page 360: ......
Page 361: ......
Page 362: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...