Changing The Brake Fluid; Drive Chain Slack - Yamaha Y15ZR Owner's Manual

Periodic maintenance and adjustment

Changing the brake fluid

Have a Yamaha dealer change the
brake fluid at the intervals specified in
the periodic maintenance and lubrica-
tion chart. In addition, have the oil seals
of the brake master cylinder and cali-
per as well as the brake hose replaced
at the intervals listed below or whenev-
er they are damaged or leaking.
Oil seals: Replace every two
years.
Brake hose: Replace every four
years.
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Drive chain slack

The drive chain slack should be
checked before each ride and adjusted
if necessary.
To check the drive chain slack
1. Place the motorcycle on the cen-
terstand.
2. Shift the transmission into the
neutral position.
3. Measure the drive chain slack as
shown.
1
1. Drive chain slack
Drive chain slack:
30.0–40.0 mm (1.18–1.57 in)
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adjust it as follows. NOTICE: Im-
proper drive chain slack will
overload the engine as well as
other vital parts of the motorcy-
cle and can lead to chain slip-
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page or breakage. To prevent
this from occurring, keep the
drive chain slack within the
specified limits.
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
1. Loosen the locknut at each end of
the swingarm, and then loosen the
axle nut and the brake caliper
bracket bolt.
2. To tighten the drive chain, turn the
drive chain slack adjusting nut at
each end of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting nut at each end
of the swingarm in direction (b),
and then push the rear wheel for-
ward. NOTICE: Improper drive
chain slack will overload the en-
gine as well as other vital parts
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