Yamaha YFM660FS, Supplementary Service Manual

Page: 88 / 478

COOLING SYSTEM .................................................................................... 9-47
CIRCUIT DIAGRAM ............................................................................ 9-47
TROUBLESHOOTING ....................................................................... 9-48
2WD/4WD SELECTING SYSTEM .............................................................. 9-52
CIRCUIT DIAGRAM ............................................................................ 9-52
TROUBLESHOOTING ........................................................................ 9-53
CHAPTER 10.
TROUBLESHOOTING
STARTING FAILURE/HARD STARTING ................................................... 10-1
FUEL SYSTEM .................................................................................... 10-1
ELECTRICAL SYSTEM ....................................................................... 10-1
COMPRESSION SYSTEM .................................................................. 10-2
POOR IDLE SPEED PERFORMANCE ...................................................... 10-2
POOR IDLE SPEED PERFORMANCE ............................................... 10-2
POOR MEDIUM AND HIGH-SPEED PERFORMANCE ............................. 10-2
POOR MEDIUM AND HIGH-SPEED PERFORMANCE ..................... 10-2
FAULTY DRIVE TRAIN .............................................................................. 10-3
FAULTY GEAR SHIFTING ......................................................................... 10-4
HARD SHIFTING ................................................................................. 10-4
SHIFT LEVER DOES NOT MOVE ...................................................... 10-4
JUMPS OUT OF GEAR ....................................................................... 10-4
FAULTY CLUTCH PERFORMANCE ......................................................... 10-4
ENGINE OPERATES BUT MACHINE WILL NOT MOVE ................... 10-4
CLUTCH SLIPPING ............................................................................ 10-4
POOR STARTING PERFORMANCE .................................................. 10-4
POOR SPEED PERFORMANCE ........................................................ 10-5
OVERHEATING .......................................................................................... 10-5
OVERHEATING .................................................................................. 10-5
FAULTY BRAKE ......................................................................................... 10-5
POOR BRAKING EFFECT .................................................................. 10-5