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Yamaha YZ250F(E) User Manual

Yamaha YZ250F(E)
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REAR BRAKE
4-26
EAS1SM1151
REMOVING THE REAR BRAKE CALIPER
TIP
Before disassembling the brake caliper, drain
the brake fluid from the entire brake system.
1. Remove:
Union bolt
Copper washers
Brake hose
TIP
Put the end of the brake hose into a container
and pump out the brake fluid.
EAS1SM1152
DISASSEMBLING THE REAR BRAKE CALI-
PER
1. Remove:
Brake caliper piston “1”
Brake caliper piston dust seal “2”
Brake caliper piston seal “3”
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Blow compressed air into the brake hose
joint opening to force out the piston from the
brake caliper.
EWA13550
WARNING
Cover the brake caliper piston with a cloth.
Be careful not to get injured when the pis-
ton is expelled from the brake caliper.
Do not use a screwdriver etc. for removing
the brake caliper piston.
b. Remove the brake caliper piston dust seal
and the brake caliper piston seal.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS1SM1153
CHECKING THE REAR BRAKE CALIPER
1. Check:
Brake caliper piston “1”
Rust/scratches/wear Replace the brake
caliper piston.
Brake caliper cylinder “2”
Scratches/wear Replace the brake cali-
per assembly.
Brake caliper body “3”
Cracks/damage Replace the brake cali-
per assembly.
Brake fluid delivery passages
(brake caliper body)
Obstruction Blow out with compressed
air.
EWA13610
WARNING
When the brake caliper is disassembled, re-
place the brake caliper piston seal and the
brake caliper piston dust seal with new
ones.
2. Check:
Brake caliper bracket
Crack/damage Replace.
EAS1SM1154
ASSEMBLING THE REAR BRAKE CALIPER
EWA13620
WARNING
Before installation, clean and lubricate the
internal parts. Use new brake fluid for
cleaning and lubricating.
Never use solvents on internal brake com-
ponents as they will cause the piston seals
to swell and distort.
When the brake caliper is disassembled,
replace the brake caliper piston seal and
the brake caliper piston dust seal with new
ones.
2
3
1
Recommended brake fluid
DOT 4
1
2
3

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Yamaha YZ250F(E) Specifications

General IconGeneral
BrandYamaha
ModelYZ250F(E)
CategoryMotorcycle
LanguageEnglish

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