Yamaha WR250F(P), Owner'S Service Manual, Page: 234 / 694

3 - 33
INSP
ADJ
SPROCKETS INSPECTION/DRIVE CHAIN INSPECTION
SPROCKETS INSPECTION
1. Inspect:
●
Sprocket teeth
a
Excessive wear
→
Replace.
NOTE:
Replace the drive sprocket, rear wheel
sprocket and drive chain as a set.
DRIVE CHAIN INSPECTION
1. Remove:
●
Drive chain 1
NOTE:
Remove the drive chain using a drive chain
cutter
2 .
2. Clean:
●
Drive chain
Brush off as much dirt as possible.
Then clean the drive 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.
1
3. Inspect:
●
O-ring
1
(drive chain)
Damage
→
Replace the drive chain.
●
Roller
2
●
Side plate
3
Damage/wear
→
Replace the drive
chain.
4. Measure:
●
Drive chain length (10 links)
a
Out of specification
→
Replace.
Drive chain length (10 links):
<Limit>: 150.1 mm (5.91 in)