Changing The Brake Fluid; Drive Belt Slack - Yamaha BOLT 2019 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 every 2 years. In addition,
have the seals of the master cylinders
and brake calipers, as well as the brake
hoses replaced at the intervals listed
below or sooner if they are damaged or
leaking.
 Brake seals: every 2 years
 Brake hoses: every 4 years
Periodic maintenance and adjustment
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Drive belt slack

The drive belt slack should be checked
and adjusted at the intervals specified
in the periodic maintenance and lubri-
cation chart.
To check the drive belt slack
1. Place the vehicle on the side-
stand.
2. Note the current position of the
drive belt using the marks near the
drive belt check hole.
2
1
1. Drive belt
2. Marks
3. Note the position of the drive belt
with a force of 45 N (4.5 kgf, 10 lbf)
applied to the belt with a belt ten-
sion gauge as shown.
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