Sprockets Inspection; Drive Chain Inspection - Yamaha YZ250F(V) Owner's Service Manual

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. Measure:
• Drive chain length (15 links) a
Out of specification → Replace.
Drive chain length (15 links):
<Limit>: 242.9 mm (9.563 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:
• Master link clip
• Joint 1
• Drive chain 2
3. Clean:
• Drive chain
Place it in kerosene, and brush off as
much dirt as possible. Then remove the
drive chain from the kerosene and dry the
drive chain.
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