Changing The Brake Fluid; Drive Chain Slack - Yamaha 2009 WR250R 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 TIP after the periodic maintenance
1
and lubrication chart. In addition, have
the oil seals of the master cylinders and
2
calipers as well as the brake hoses re-
placed at the intervals listed below or
3
whenever they are damaged or leak-
ing.
G
Oil seals: Replace every two
4
years.
G Brake hoses: Replace every four
5
years.
6
7
8
9
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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 side-
stand.
TIP
When checking and adjusting the drive
chain slack, there should be no weight
on the motorcycle.
2. Shift the transmission into the neu-
tral position.
3. Push on the drive chain at the cen-
ter point between the chain ten-
sioner and the chain support
mounting bolt with a force of 50 N
(5.0 kgf, 36 lbf).
4. Measure drive chain slack be-
tween the swingarm and the top of
the chain link closest to the swing-
arm as shown.
Drive chain slack:
8.0–13.0 mm (0.31–0.51 in)
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1. Drive chain slack
2. Chain support mounting bolt
3. Chain tensioner
To adjust the drive chain slack
7-25
3
2
5. If the drive chain slack is incorrect,
adjust it as follows.
1. Loosen the axle nut and the lock-
nut on each side of the swingarm.
2. To tighten the drive chain, turn the
drive chain slack adjusting bolt on
each side of the swingarm in direc-
tion (a). To loosen the drive chain,
turn the adjusting bolt on each side
of the swingarm in direction (b),
and then push the rear wheel for-
ward. NOTICE: Improper drive
chain slack will overload the en-
1
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