Yamaha TT-R90(S), Owner'S Service Manual

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INSP
ADJ
DRIVE CHAIN SLACK ADJUSTMENT
DRIVE CHAIN SLACK ADJUSTMENT
1. Elevate the rear wheel by placing the
suitable stand under the engine.
2. Check:
●
Drive chain slack
a
In the center between the drive axle
and rear wheel axle.
Out of specification
→
Adjust.
NOTE:
Before checking and/or adjusting, rotate the
rear wheel through several revolutions and
check the slack several times to find the tight-
est point. Check and/or adjust chain slack with
rear wheel in this “tight chain” position.
Drive chain slack:
40 ~ 53 mm (1.6 ~ 2.1 in)
3. Adjust:
●
Drive chain slack
Drive chain slack adjustment steps:
●
Loosen the wheel axle nut 1 and locknuts
2 .
●
Adjust chain slack by turning the adjusters
3 .
To tighten
→
Turn adjuster 3 clockwise.
To loosen
→
Turn adjuster 3 counter-
clockwise and push wheel
forward.
●
Turn each adjuster exactly the same
amount to maintain correct axle alignment.
(There are marks
a
on each side of chain
puller alignment.)
NOTE:
Turn the adjuster so that the chain is in line
with the sprocket, as viewed from the rear.
CAUTION:
Too small chain slack will overload the
engine and other vital parts; keep the
slack within the specified limits.
1
3
a
2