Changing The Brake Fluid; Drive Chain Slack - Yamaha WR250R 2020 Owner's Manual

Periodic maintenance and adjustment
1

Changing the brake fluid

Have a Yamaha dealer change the
brake fluid every 2 years. In addition,
2
have the seals of the master cylinders
and brake calipers, as well as the brake
3
hoses replaced at the intervals listed
below or sooner if they are damaged or
4
leaking.

Brake seals: every 2 years

Brake hoses: every 4 years
5
6
7
8
9
10
11
12
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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 sides-
tand.
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 up on the drive chain at the
center point between the chain
tensioner and the chain support
mounting bolt.
4. Measure distance A between the
swingarm and the top of the chain
link closest to the swingarm as
shown.
Distance A:
8.0–13.0 mm (0.31–0.51 in)
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1. Distance A
2. Chain support mounting bolt
3. Chain tensioner
To adjust the drive chain slack
Consult a Yamaha dealer before ad-
justing the drive chain slack.
7-28
3
2
5. If the drive chain slack is incorrect,
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-
page or breakage. To prevent
this from occurring, keep the
drive chain slack within the
specified limits.
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1. Loosen the axle nut and the lock-
1
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