Yamaha FX10X Service Manual page 488

Hide thumbs Also See for FX10X:

• Crankcase bolts

• Place the engine upside down.

• Loosen the bolts in decreasing numerical order of

the embossed numbers on the crankcase.

• Loosen each bolt 1/4 of a turn at a time. After all

of the bolts are fully loosened, remove them.

• Lower crankcase

Tap on one side of the crankcase with a soft-

face hammer. Tap only on reinforced portions

of the crankcase, not on the crankcase mating

surfaces. Work slowly and carefully and make

sure that the crankcase halves separate evenly.

• Crankcase:

Cracks/damage → Replace.

• Thoroughly wash the crankcase halves in a mild

• Thoroughly clean all the gasket surfaces and

crankcase mating surfaces.

• Oil delivery passages

Obstruction → Blow out with compressed air.

• Timing chain

• Oil pump drive chain

Damage/stiffness → Replace the chain and

sprocket as a set.

• Timing chain guide (intake side)

• Timing chain guide (exhaust side)

Damage/wear → Replace the timing chain

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