Yamaha YFM50S Service Manual page 10

CLUTCH ........................................................................................................4-33
REMOVING THE CLUTCH ..................................................................... 4-35
REMOVING THE PRIMARY DRIVE GEAR ............................................4-35
CHECKING THE FRICTION PLATES.....................................................4-35
CHECKING THE CLUTCH PLATES .......................................................4-36
CHECKING THE CLUTCH SPRINGS.....................................................4-36
CHECKING THE CLUTCH HOUSING ....................................................4-36
CHECKING THE CLUTCH BOSS........................................................... 4-37
CHECKING THE PRESSURE PLATE ....................................................4-37
CHECKING THE CLUTCH BALLS.......................................................... 4-37
CHECKING THE PRIMARY DRIVE GEARS ..........................................4-37
INSTALLING THE PRIMARY DRIVE GEAR...........................................4-38
INSTALLING THE CLUTCH.................................................................... 4-38
STARTER CLUTCH AND OIL PUMP ........................................................... 4-42
CHECKING THE STARTER CLUTCH ....................................................4-44
CHECKING THE OIL PUMP ................................................................... 4-45
SHIFT SHAFT................................................................................................4-47
CHECKING THE SHIFT SHAFT ............................................................. 4-48
CHECKING THE STOPPER LEVER ......................................................4-48
INSTALLING THE STOPPER LEVER ....................................................4-48
INSTALLING THE SHIFT SHAFT ........................................................... 4-48
CRANKCASE ................................................................................................4-49
CRANKCASE BEARINGS....................................................................... 4-50
SEPARATING THE CRANKCASE.......................................................... 4-51
CHECKING THE TIMING CHAIN............................................................ 4-51
CHECKING THE BEARINGS AND OIL SEALS...................................... 4-52
CHECKING THE CRANKCASE ..............................................................4-52
INSTALLING THE BEARINGS................................................................4-52
ASSEMBLING THE CRANKCASE.......................................................... 4-53
CRANKSHAFT ..............................................................................................4-54
CHECKING THE CRANKSHAFT ............................................................ 4-55
INSTALLING THE CRANKSHAFT .......................................................... 4-55
TRANSMISSION............................................................................................ 4-56
REMOVING THE TRANSMISSION ........................................................ 4-57
CHECKING THE SHIFT FORK ...............................................................4-57
CHECKING THE SHIFT DRUM ..............................................................4-58
CHECKING THE TRANSMISSION ......................................................... 4-58
INSTALLING THE TRANSMISSION .......................................................4-59
MIDDLE GEAR ..............................................................................................4-60
REMOVING THE MIDDLE DRIVEN SHAFT...........................................4-61
CHECKING THE PINION GEARS .......................................................... 4-62
SELECTING MIDDLE DRIVEN GEAR SHIMS ....................................... 4-63
INSTALLING THE MIDDLE DRIVEN SHAFT .........................................4-64
MEASURING THE MIDDLE GEAR BACKLASH..................................... 4-66