TROUBLESHOOTING
9-3
Fuel system
1. Throttle body
• Damaged or loose throttle body joint
2. Air filter
• Clogged air filter element
Chassis
1. Brake(s)
• Dragging brake
Electrical system
1. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
2. Ignition system
• Faulty ECU
• Faulty coolant temperature sensor
EAS1SM9359
OVERCOOLING
Cooling system
1. Coolant temperature sensor
• Faulty coolant temperature sensor
EAS1SM9360
POOR BRAKING PERFORMANCE
Chassis
1. Brake(s)
• 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
EAS1SM9361
FRONT FORK OIL LEAKING
Chassis
1. Front fork
• 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
EAS1SM9362
FAULTY FRONT FORK LEGS
Chassis
1. Front fork
• Bent or damaged inner tube
• Bent or damaged outer tube
• Broken fork spring
• Bent or damaged damper rod
• Incorrect oil viscosity
• Incorrect oil level
EAS1SM9363
UNSTABLE HANDLING
Chassis
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
Summary of Contents for YZ250F 2016
Page 4: ......
Page 10: ......
Page 12: ......
Page 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR ...
Page 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF ...
Page 40: ...CLEANING AND STORAGE 1 26 ...
Page 63: ...LUBRICATION POINTS AND LUBRICANT TYPES 2 22 ...
Page 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 ...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 ...
Page 72: ...CABLE ROUTING DIAGRAM 2 31 EAS1SM9062 CABLE ROUTING DIAGRAM ...
Page 74: ...CABLE ROUTING DIAGRAM 2 33 ...
Page 76: ...CABLE ROUTING DIAGRAM 2 35 ...
Page 78: ...CABLE ROUTING DIAGRAM 2 37 ...
Page 80: ...CABLE ROUTING DIAGRAM 2 39 ...
Page 82: ...CABLE ROUTING DIAGRAM 2 41 ...
Page 122: ...ELECTRICAL SYSTEM 3 38 ...
Page 190: ...CHAIN DRIVE 4 66 ...
Page 286: ......
Page 293: ...CHARGING SYSTEM 8 7 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser ...
Page 295: ...CHARGING SYSTEM 8 9 ...
Page 321: ...FUEL PUMP SYSTEM 8 35 ...
Page 322: ...ELECTRICAL COMPONENTS 8 36 EAS1SM9331 ELECTRICAL COMPONENTS EAS1SM9332 9 10 1 2 3 4 5 6 7 8 ...
Page 324: ...ELECTRICAL COMPONENTS 8 38 EAS1SM9333 CHECKING THE SWITCHES Y W P Sb 1 2 P Sb Y W ...
Page 325: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch ...
Page 334: ...ELECTRICAL COMPONENTS 8 48 ...
Page 342: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7 ...
Page 353: ......
Page 354: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER ...