TROUBLESHOOTING
9-1
EAS28450
TROUBLESHOOTING
EAS28460
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 proce-
dure in this manual for checks, adjustments,
and replacement of parts.
EAS28470
STARTING FAILURES
Engine
1. Cylinder(s) and cylinder head
• Loose spark plug
• Loose cylinder head
• Damaged cylinder head 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(s) 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 drain hose
• Deteriorated or contaminated fuel
2. Fuel pump
• Faulty fuel pump
• Faulty fuel pump relay
3. Throttle body(-ies)
• Deteriorated or contaminated fuel
• Sucked-in air
Electrical system
1. Battery
• Discharged battery
• Faulty battery
2. Fuse(s)
• Blown, damaged or incorrect fuse
• Improperly installed fuse
3. Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
• Fouled spark plug
• Worn or damaged electrode
• Worn or damaged insulator
4. Ignition coil(s)
• Cracked or broken ignition coil body
• Broken or shorted primary or secondary
coils
5. Ignition system
• Faulty ECU
• Faulty crankshaft position sensor
• Faulty cylinder identification sensor
6. Switches and wiring
• Faulty main switch
• Faulty engine stop switch
• Broken or shorted wiring
• Faulty neutral switch
• Faulty start switch
• Faulty sidestand switch
• Faulty clutch switch
• Improperly grounded circuit
• Loose connections
7. Starting system
• Faulty starter motor
• Faulty starter relay
• Faulty starting circuit cut-off relay
• Faulty starter clutch
EAS28490
INCORRECT ENGINE IDLING SPEED
Engine
1. Cylinder(s) and cylinder head
• Incorrect valve clearance
• Damaged valve train components
2. Air filter
• Clogged air filter element
Fuel system
1. Throttle body(-ies)
• Damaged or loose throttle body joint
• Improperly synchronized throttle bodies
• Improper throttle cable free play
• Flooded throttle body
• Faulty air induction system
Summary of Contents for R6 2009
Page 1: ...SERVICE MANUAL YZFR6Y C 13S 28197 11 LIT 11616 22 51 2009 ...
Page 6: ......
Page 8: ......
Page 60: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 EAS20410 LUBRICATION DIAGRAMS 1 2 3 4 ...
Page 62: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 31 1 2 3 4 8 7 6 5 ...
Page 64: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 33 1 2 3 4 5 ...
Page 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 35 1 5 4 3 2 ...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 37 3 1 2 5 4 ...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 39 1 3 2 ...
Page 71: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 40 1 Oil pipe 2 Main axle 3 Drive axle ...
Page 72: ...COOLING SYSTEM DIAGRAMS 2 41 EAS20420 COOLING SYSTEM DIAGRAMS 1 2 3 4 ...
Page 74: ...COOLING SYSTEM DIAGRAMS 2 43 A A 2 1 3 4 5 6 7 8 6 13 8 9 15 14 9 10 11 12 ...
Page 76: ...CABLE ROUTING 2 45 EAS20430 CABLE ROUTING ...
Page 78: ...CABLE ROUTING 2 47 ...
Page 80: ...CABLE ROUTING 2 49 ...
Page 82: ...CABLE ROUTING 2 51 ...
Page 84: ...CABLE ROUTING 2 53 ...
Page 86: ...CABLE ROUTING 2 55 ...
Page 88: ...CABLE ROUTING 2 57 ...
Page 90: ...CABLE ROUTING 2 59 A A ...
Page 92: ...CABLE ROUTING 2 61 ...
Page 95: ......
Page 135: ......
Page 206: ...CHAIN DRIVE 4 71 1 2 3 a a New ...
Page 209: ......
Page 240: ...PICKUP ROTOR 5 31 ...
Page 286: ...TRANSMISSION 5 77 ...
Page 300: ...WATER PUMP 6 13 ...
Page 316: ...AIR INDUCTION SYSTEM 7 15 EAS27040 AIR INDUCTION SYSTEM 2 1 2 4 3 4 3 6 4 5 A A ...
Page 323: ......
Page 324: ...IGNITION SYSTEM 8 1 EAS27090 IGNITION SYSTEM EAS27110 CIRCUIT DIAGRAM ...
Page 330: ...ELECTRIC STARTING SYSTEM 8 7 EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM ...
Page 336: ...CHARGING SYSTEM 8 13 EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM ...
Page 339: ...CHARGING SYSTEM 8 16 ...
Page 340: ...LIGHTING SYSTEM 8 17 EAS27240 LIGHTING SYSTEM EAS27250 CIRCUIT DIAGRAM ...
Page 344: ...SIGNALING SYSTEM 8 21 EAS27270 SIGNALING SYSTEM EAS27280 CIRCUIT DIAGRAM ...
Page 351: ...SIGNALING SYSTEM 8 28 ...
Page 352: ...COOLING SYSTEM 8 29 EAS27300 COOLING SYSTEM EAS27310 CIRCUIT DIAGRAM ...
Page 355: ...COOLING SYSTEM 8 32 ...
Page 356: ...FUEL INJECTION SYSTEM 8 33 EAS27330 FUEL INJECTION SYSTEM EAS27340 CIRCUIT DIAGRAM ...
Page 395: ...FUEL INJECTION SYSTEM 8 72 ...
Page 396: ...FUEL PUMP SYSTEM 8 73 EAS27550 FUEL PUMP SYSTEM EAS27560 CIRCUIT DIAGRAM ...
Page 399: ...FUEL PUMP SYSTEM 8 76 ...
Page 400: ...ELECTRICAL COMPONENTS 8 77 EAS27970 ELECTRICAL COMPONENTS ...
Page 402: ...ELECTRICAL COMPONENTS 8 79 1 5 4 3 2 6 7 8 9 10 12 13 11 14 15 16 17 18 ...
Page 404: ...ELECTRICAL COMPONENTS 8 81 EAS27980 CHECKING THE SWITCHES ...
Page 431: ......
Page 432: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...