TROUBLE SHOOTING
9-1
EAS1SM1350
TROUBLE SHOOTING
EAS1SM1351
GENERAL INFORMATION
TIP
The following guide for troubleshooting does
not cover all the possible causes of trouble. It
should be helpful, however, as a guide to basic
troubleshooting. Refer to the relative procedure
in this manual for checks, adjustments, and re-
placement of parts.
EAS1SM1352
STARTING FAILURES
Engine
1. Cylinder and cylinder head
• Loose spark plug
• Loose cylinder head or cylinder
• Damaged cylinder head gasket
• Damaged cylinder gasket
• Worn or damaged cylinder
• Incorrect valve clearance
• Improperly sealed valve
• Incorrect valve-to-valve-seat contact
• Incorrect valve timing
• Faulty valve spring
• Seized valve
2. Piston and piston ring(s)
• Improperly installed piston ring
• Damaged, worn or fatigued piston ring
• Seized piston ring
• Seized or damaged piston
3. Air filter
• Improperly installed air filter
• Clogged air filter element
4. Crankcase and crankshaft
• Improperly assembled crankcase
• Seized crankshaft
Fuel system
1. Fuel tank
• Empty fuel tank
• Clogged fuel tank breather hose
• Deteriorated or contaminated fuel
• Clogged or damaged fuel hose
2. Fuel pump
• Faulty fuel pump
3. Throttle body
• Deteriorated or contaminated fuel
• Sucked-in air
Electrical system
1. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
2. Ignition coil
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary
coils
3. Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
• Broken generator rotor woodruff key
4. Switches and wiring
• Faulty ECU
• Faulty engine stop switch
• Broken or shorted wiring
• Faulty neutral switch
• Improperly grounded circuit
• Loose connections
EAS1SM1353
INCORRECT ENGINE IDLING SPEED
Engine
1. Cylinder and cylinder head
• Incorrect valve clearance
• Damaged valve train components
2. Air filter
• Clogged air filter element
Fuel system
1. Throttle body
• Damaged or loose throttle body joint
• Improperly synchronized throttle bodies
• Improper throttle cable free play
• Flooded throttle body
Electrical system
1. Spark plug
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
• Faulty spark plug cap
2. Ignition coil
• Broken or shorted primary or secondary
coils
• Cracked or broken ignition coil
Содержание YZ250F 2014
Страница 4: ......
Страница 10: ......
Страница 12: ......
Страница 16: ...LOCATION OF IMPORTANT LABELS 1 2 EUR ...
Страница 17: ...LOCATION OF IMPORTANT LABELS 1 3 AUS NZL ZAF ...
Страница 42: ...CLEANING AND STORAGE 1 28 ...
Страница 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 25 ...
Страница 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27 ...
Страница 72: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 ...
Страница 74: ...CABLE ROUTING DIAGRAM 2 31 EAS1SM1064 CABLE ROUTING DIAGRAM ...
Страница 76: ...CABLE ROUTING DIAGRAM 2 33 ...
Страница 78: ...CABLE ROUTING DIAGRAM 2 35 ...
Страница 80: ...CABLE ROUTING DIAGRAM 2 37 ...
Страница 82: ...CABLE ROUTING DIAGRAM 2 39 ...
Страница 84: ...CABLE ROUTING DIAGRAM 2 41 ...
Страница 190: ...CHAIN DRIVE 4 66 ...
Страница 250: ...OIL PUMP AND BALANCER GEAR 5 57 c d 6 6 7 8 8 b ...
Страница 286: ......
Страница 293: ...CHARGING SYSTEM 8 7 EAS1SM1325 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser ...
Страница 295: ...CHARGING SYSTEM 8 9 EAS1SM1326 ...
Страница 321: ...FUEL PUMP SYSTEM 8 35 EAS1SM1333 ...
Страница 322: ...ELECTRICAL COMPONENTS 8 36 ELECTRICAL COMPONENTS EAS1SM1334 9 10 1 2 3 4 5 6 7 8 ...
Страница 324: ...ELECTRICAL COMPONENTS 8 38 CHECKING THE SWITCHES B Y P Sb 2 1 ...
Страница 325: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch ...
Страница 334: ...ELECTRICAL COMPONENTS 8 48 ...
Страница 342: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7 ...
Страница 353: ......
Страница 354: ...PRINTED IN JAPAN E PRINTED ON RECYCLED PAPER ...