Changing The Brake Fluid; Drive Chain Slack - Yamaha YZ85 2021 Owner's Manual

 Insufficient brake fluid may al-
low air to enter the brake sys-
tem, reducing
performance.
 Clean the filler cap before re-
moving. Use only DOT 4 brake
fluid from a sealed container.
 Use only the specified brake flu-
id; otherwise, the rubber seals
may deteriorate, causing leak-
age.
 Refill with the same type of
brake fluid. Adding a brake fluid
other than DOT 4 may result in a
harmful chemical reaction.
 Be careful that water does not
enter the brake fluid reservoir
when refilling. Water will signifi-
cantly lower the boiling point of
the fluid and may result in vapor
lock.

Changing the brake fluid

Have a Yamaha dealer change the
braking
brake fluid at the intervals specified in
the periodic maintenance and lubrica-
tion chart. In addition, have the oil seals
of the master cylinders and calipers as
well as the brake hoses replaced at the
intervals listed below or whenever they
are damaged or leaking.
 Oil seals: Replace every two
years.
 Brake hoses: Replace every four
years.
Periodic maintenance and adjustment
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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 a suitable
stand. (See page 7-26.)
2. Confirm the rear wheel is off the
ground and the rear shock ab-
sorber is fully extended.
3. Shift the transmission into neutral.
4. Pull up the drive chain until the
chain is taut, and then measure
distance A between the top of the
swingarm and the bottom of the
chain as shown.
1 1
1. Distance A
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