Yamaha XT660R S Service Manual page 232

SWINGARM AND DRIVE CHAIN
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2. Check:
• drive chain
Stiffness → Clean and lubricate or replace.
3. Clean:
• drive chain
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a. Wipe the drive chain with a clean cloth.
b. Put the drive chain in kerosene and remove
any remaining dirt.
c. Remove the drive chain from the kerosene
and completely dry it.
CAUTION:
_
• This motorcycle has a drive chain with
small rubber O-rings 1 between the drive
chain side plates. Never use high-pres-
sure water or air, steam, gasoline, certain
solvents (e.g., benzine), or a coarse brush
to clean the drive chain. High-pressure
methods could force dirt or water into the
internal sections of the drive chain, and
solvents will deteriorate the O-rings. A
coarse brush can also damage the O-
rings. Therefore, use only kerosene to
clean the drive chain.
• Don't soak the drive chain in kerosine for
more than ten minutes, otherwise the O-
rings can be damaged.
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4. Check:
• O-rings 1
Damage → Replace the drive chain.
• drive chain rollers 2
Damage/wear → Replace the drive chain.
• drive chain side plates 3
Damage/wear → Replace the drive chain.
Cracks → Replace the drive chain and
make sure the battery breather hose is
properly routed away from the drive chain
and below the swingarm.
CHAS
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