Drive Chain Adjustment - Honda Motorcycle Service Manual

MAINTENANCE
DRIVE CHAIN
ADJUSTMENT
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Inspecting the drive chain while the engine is running
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or
can result in serious hand or finger injury.
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When there is too little slack, a change in the distance bet-
ween sprocket centers, due t o suspension movement, results
in excessive tension on the chain.
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DEPENDING ON MODEL
In this condition, the chain and transmission or crankcase may
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be damaged, and the large amount of friction adversely effects
the running performance of the vehicle.
Too excessive slack in the chain leads t o large oscillations
when the vehicle is running.
In this condition, the chain may come off the sprockets or
damage pans it contacts.
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BDJUSTER NUT
Carrv out the followina ~ r o c e d u r e for adiustment:
With the vehicle in neutral, support on the center or side stand.
(Some models need t o be checked with the rear wheel raised.
Refer t o the Model Specific service manual for details).
Check the slack in the chain at the mid point between the t w o
sprockets.
(On models with a chain tensioner, loosen the tensioner before
checking).
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Loosen the rear axle nut until the wheel can be moved.
Loosen the adjuster lock nut, turn the adjuster nut or bolt and
adjust the play.
On snail cam types, rotate the adjuster plates.
INDEX MARK
ADJUSTER BOLT
OCK NUT
USTER NUT
LOCK NUT
INDEXMARK
ADJUSTER
As the rear suspension moves through its travel, the distance
between the drive and driven sprocket centers varies.
Therefore, it is important t o adjust the chain so that it has at
least the minimum amount of acceptable slack when the
sprockets are farthest apart-or when the center of the drive
sprocket, swingarm pivot bolt and the rear axle are in align-
ment. The Model Specific manual provides a proper dimension
for each model based on this minimum slack and maximum
distance position, but
it
is measured in a much more conve-
nient suspension position.
A scale is included on the adjuster. Be sure that the reading on
the scale is the same for both sides.
CAUTION
Date of Issue: Sep., 1988
O
HONDA MOTOR CO.. LTD.
2-2 1
PIN
o f alignment and can cause excessive tire, sprocket and
chain wear.