Separating The Crankcase; Checking The Timing Chain And Guide; Checking The Oil Delivery Pipe - Yamaha YFM660FS Grizzly 4x4 Supplementary Service Manual

È
É
CRANKCASE

SEPARATING THE CRANKCASE

1.Separate:
Left crankcase
G
Right crankcase
G
*****************************************************
Separation steps:
G
Remove the crankcase bolts.
NOTE:
Loosen each bolt 1/4 of a turn at a time and
G
after all the bolts are loosened, remove
them.
Loosen the bolts in stages, using a criss-
G
cross pattern.
È Left crankcase
É Right crankcase
G
Remove the left crankcase.
CAUTION:
Use a soft hammer to tap on one side of the
crankcase. Tap only on reinforced portions
of the crankcase. Do not tap on the crank-
case mating surfaces. Work slowly and
carefully. Make sure that the crankcase
halves separate evenly.
G
Remove the dowel pins.
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CHECKING THE TIMING CHAIN AND GUIDE

1.Check:
Timing chain
G
Cracks/stiff → Replace the timing chain and
camshaft sprocket as a set.
2.Check:
Intake side timing chain guide
G
Wear/damage → Replace.

CHECKING THE OIL DELIVERY PIPE

1.Check:
Oil delivery pipe
G
Cracks/damage → Replace.
Clogged → Blow out with compressed air.
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ENG