Yamaha XT660X Service Manual

TRBL
SHTG
CHAPTER 9
TROUBLESHOOTING
STARTING FAILURES
....................................................................................9-1
ENGINE.....................................................................................................9-1
FUEL SYSTEM..........................................................................................9-1
ELECTRICAL SYSTEMS ..........................................................................9-2
INCORRECT ENGINE IDLING SPEED
...........................................................9-2
ENGINE.....................................................................................................9-2
FUEL SYSTEM..........................................................................................9-2
ELECTRICAL SYSTEMS ..........................................................................9-2
POOR MEDIUM-AND-HIGH-SPEED PERFORMANCE
.................................9-3
ENGINE.....................................................................................................9-3
FUEL SYSTEM..........................................................................................9-3
FAULTY GEAR SHIFTING
..............................................................................9-3
SHIFTING IS DIFFICULT ..........................................................................9-3
SHIFT PEDAL DOES NOT MOVE ............................................................9-3
JUMPS OUT OF GEAR.............................................................................9-3
FAULTY CLUTCH
...........................................................................................9-3
CLUTCH SLIPS.........................................................................................9-3
CLUTCH DRAGS ......................................................................................9-3
OVERHEATING
...............................................................................................9-4
ENGINE.....................................................................................................9-4
COOLING SYSTEM .................................................................................. 9-4
FUEL SYSTEM..........................................................................................9-4
CHASSIS...................................................................................................9-4
ELECTRICAL SYSTEMS ..........................................................................9-4
OVERCOOLING
..............................................................................................9-4
COOLING SYSTEM .................................................................................. 9-4
POOR BRAKING PERFORMANCE
................................................................9-4
FAULTY FRONT FORK LEGS
........................................................................9-5
LEAKING OIL ............................................................................................9-5
MALFUNCTION.........................................................................................9-5
UNSTABLE HANDLING
..................................................................................9-5

Yamaha XT660X Specifications

General

Displacement	660cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	5-speed
Final Drive	Chain
Rear Brake	Single disc, Ø 245 mm
Front Tyre	120/70 R17
Rear Tyre	160/60 R17
Maximum Power	48 HP (35.3 kW) @ 6, 000 rpm
Maximum Torque	58.4Nm (43.1lb-ft) @ 5, 250rpm
Front Suspension	Telescopic fork
Rear Suspension	Swingarm, (link suspension)
Fuel Tank Capacity	15 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC, 4-valves