Yamaha XT660R S 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 XT660R S Specifications

General

Displacement	660 cc
Bore x Stroke	100.0 mm x 84.0 mm
Compression Ratio	10.0:1
Fuel System	Fuel Injection
Ignition System	TCI
Starter System	Electric
Transmission System	5-speed
Final Drive	Chain
Front Suspension System	Telescopic forks
Front Tyre	90/90-21 M/C 54S
Rear Tyre	130/80-17 M/C 65S
Overall Width	865 mm
Overall Height	1, 230 mm
Seat Height	865 mm
Wheelbase	1, 505 mm
Wet Weight	181 kg
Fuel Tank Capacity	15 litres
Oil Tank Capacity	2.9 litres
Engine Type	Liquid-cooled, 4-stroke, single cylinder, SOHC
Maximum Power	48hp (35kW) @ 6, 000rpm
Frame	Steel diamond
Rear Suspension System	Swingarm, (link suspension)
Front Brake	Single 298mm disc, 2-piston caliper
Rear Brake	Single Disc, 245 mm