Sprockets Inspection; Drive Chain Inspection - Yamaha WR450F(V) Owner's Service Manual

SPROCKETS INSPECTION/DRIVE CHAIN INSPECTION
1
EC368000

SPROCKETS INSPECTION

1. Inspect:
• Sprocket teeth a
Excessive wear → Replace.
NOTE:
Replace the drive, driven sprockets and drive
chain as a set.

DRIVE CHAIN INSPECTION

1. Measure:
• Drive chain length (15 links) a
Out of specification → Replace.
Drive chain length (15 links):
<Limit>: 239.3 mm (9.42 in)
NOTE:
• While measuring the drive chain length, push
down on the drive chain to increase its ten-
sion.
• Measure the length between drive chain
roller 1 and F as shown.
• Perform this measurement at two or three
different places.
2. Remove:
• Drive chain 1
NOTE:
Remove the drive chain using a chain cutter
2.
3. Clean:
• Drive chain
Brush off as much dirt as possible.
Then clean the chain using the chain
cleaner.
CAUTION:
This machine has a drive chain with small
rubber O-rings 1 between the side plates.
Steam cleaning, high-pressure washes,
certain solvent and kerosene can damage
these O-rings.
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