Honda CR250R 2004 Owner's Manual page 45

4. SERVICE AND MAINTENANCE
Worn Sprocket
Damaged Sprocket
Teeth
Teeth
REPLACE
Normal Sprocket
Teeth
GOOD
4. Measure a section of the drive chain to determine
whether the chain is worn beyond its service limit.
Put the transmission in gear, and then turn the rear
wheel forward until the lower section of the chain is
pulled taut. With the chain held taut and any kinked
joints straightened, measure the distance between
a span of 17 pins, from pin center to pin center. If the
measurement exceeds the service limit, replace the
chain. After the chain is measured, shift the trans-
mission into neutral again before proceeding with
inspection and service.
Replacement chain:
D.I.D 520DMA2
SERVICE LIMIT: 10.20 in (259.0 mm)
MEASURE A SPAN OF 17 PINS (16 PITCHES)
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5. Lubricate the drive chain.
6. Pass the chain over the sprockets and join the ends
of the chain with the master link. For ease of assem-
bly, hold the chain ends against adjacent rear
sprocket teeth while inserting the master link. In-
stall the master link retaining clip so that the closed
end of the clip will face the direction of forward
REPLACE wheel rotation. The master link is the most critical
part affecting the security of the drive chain. Master
links are reusable if they remain in excellent condi-
tion, but it is recommended that a new master link
retaining clip be installed whenever the drive chain
is reassembled.
7. Recheck chain slack and adjust if necessary.
Lubrication
Commercially prepared drive chain lubricants may be
purchased at most motorcycle shops and should be
used in preference to motor oil. Pro Honda Chain Lube
or an equivalent, or SAE 80 or 90 gear oil is recom-
mended.
Saturate each chain joint so that the lubricant pen-
etrates the space between adjacent surfaces of the link
plates and rollers.