1-2
FEATURES
EAS00019
FEATURES
EAS00896
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the opti-
mum air-fuel ratio in accordance with the engine operating conditions and the atmospheric temper-
ature. In a conventional carburetor system, the air-fuel ratio of the mixture that is supplied to the com-
bustion chamber is created by the volume of the intake air and the fuel that is metered by the jet used
in the respective chamber. Despite the same volume of intake air, the fuel volume requirement varies
with the engine operating conditions, such as acceleration, deceleration, or operation under a heavy
load. Carburetors that meter the fuel through the use of jets have been provided with various auxil-
iary devices, so that an optimum air-fuel ratio can be achieved to accommodate the constant changes
in the operating conditions of the engine. As the requirements for engines to deliver more perform-
ance and cleaner exhaust gases increase, it becomes necessary to control the air-fuel ratio in a more
precise and finely tuned manner. To accommodate this need, this model has adopted an electroni-
cally controlled fuel injection (FI) system in place of a conventional carburetor system. This system
can achieve an optimum air-fuel ratio required by the engine at all times by using a microprocessor
that regulates the fuel injection volume according to the engine operating conditions detected by var-
ious sensors. Adoption of the FI system has resulted in a highly precise fuel supply, improved engine
response, better fuel economy, and reduced exhaust emissions. Furthermore, the air induction sys-
tem (AI system) has been placed under computer control together with the FI system in order to re-
alize cleaner exhaust gases.
1. Fuel tank
2. Engine trouble warning light
3. Ignition coil
4. Spark plug
5. Fuel pump
6. Idling adjustment screw
7. Throttle position sensor
8. Intake air pressure sensor
9. Air filter case
10. ECU
11. Lean angle cut-off switch
12. Catalytic converter
13. Fuel injection system relay
14. Battery
15. Intake air temperature sensor
16. Coolant temperature sensor
17. Fuel injector
18. Crankshaft position sensor
19. O2 sensor
20. Air induction system solenoid
21. Air cut-off valve
Summary of Contents for XT660Z 2008
Page 1: ...SERVICE MANUAL 2008 11D F8197 E0 XT660Z ...
Page 8: ......
Page 24: ......
Page 44: ...2 20 TIGHTENING TORQUES Cylinder head tightening sequence 2 4 3 1 ...
Page 54: ...2 30 COOLING SYSTEM DIAGRAMS 1 2 3 4 5 6 7 9 10 11 12 5 8 11 A ...
Page 57: ...2 33 LUBRICATION DIAGRAMS LUBRICATION DIAGRAMS 1 A A A A B B B A A B 3 2 2 4 1 1 5 5 ...
Page 59: ...2 35 LUBRICATION DIAGRAMS A A A A 3 1 2 3 4 ...
Page 60: ...2 36 LUBRICATION DIAGRAMS 1 Oil delivery pipe 2 2 Oil delivery pipe 1 3 Oil filter 4 Oil pump ...
Page 61: ...2 37 LUBRICATION DIAGRAMS 1 7 2 3 4 5 6 A ...
Page 63: ...2 39 LUBRICATION DIAGRAMS 1 6 5 4 3 2 ...
Page 65: ...2 41 CABLE ROUTING CABLE ROUTING ...
Page 67: ...2 43 CABLE ROUTING ...
Page 69: ...2 45 CABLE ROUTING ...
Page 71: ...2 47 CABLE ROUTING ...
Page 73: ...2 49 CABLE ROUTING ...
Page 75: ...2 51 CABLE ROUTING ...
Page 77: ...2 53 CABLE ROUTING ...
Page 79: ...2 55 CABLE ROUTING ...
Page 81: ...2 57 CABLE ROUTING ...
Page 83: ...2 59 CABLE ROUTING ...
Page 176: ...4 56 FRONT FORK WARNING Make sure the brake hoses are routed prop erly 1 2 3 ...
Page 270: ......
Page 284: ......
Page 301: ...7 17 FUEL INJECTION SYSTEM WIRING DIAGRAM ...
Page 324: ......
Page 327: ...8 1 IGNITION SYSTEM EAS27090 IGNITION SYSTEM EAS27110 CIRCUIT DIAGRAM ...
Page 331: ...8 5 ELECTRIC STARTING SYSTEM EAS27160 ELECTRIC STARTING SYSTEM EAS27170 CIRCUIT DIAGRAM ...
Page 337: ...8 11 CHARGING SYSTEM EAS27200 CHARGING SYSTEM EAS27210 CIRCUIT DIAGRAM ...
Page 338: ...8 12 CHARGING SYSTEM 2 A C magneto 5 Rectifier regulator 7 Battery 8 Main fuse ...
Page 340: ...8 14 CHARGING SYSTEM ...
Page 341: ...8 15 LIGHTING SYSTEM EAS27240 LIGHTING SYSTEM EAS27250 CIRCUIT DIAGRAM ...
Page 345: ...8 19 SIGNALING SYSTEM EAS27270 SIGNALING SYSTEM EAS27280 CIRCUIT DIAGRAM ...
Page 351: ...8 25 COOLING SYSTEM EAS00807 COOLING SYSTEM CIRCUIT DIAGRAM ...
Page 354: ...8 28 COOLING SYSTEM ...
Page 355: ...8 29 IMMOBILIZER SYSTEM ET5YU1002 IMMOBILIZER SYSTEM ET5YU1003 CIRCUIT DIAGRAM ...
Page 364: ...8 38 IMMOBILIZER SYSTEM ...
Page 365: ...8 39 ELECTRICAL COMPONENTS EAS27970 ELECTRICAL COMPONENTS ...
Page 367: ...8 41 ELECTRICAL COMPONENTS ...
Page 369: ...8 43 ELECTRICAL COMPONENTS EAS27980 CHECKING THE SWITCHES ...
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Page 390: ......
Page 396: ...COLOR CODE ...
Page 397: ......
Page 398: ...YAMAHA MOTOR ITALIA S P A ...
Page 399: ...XT660Z 2008 WIRING DIAGRAM ...