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Yamaha MT-09 2021 - Assembling the Rear Brake Master Cylinder; Checking the Rear Brake Master Cylinder; Installing the Rear Brake Master Cylinder; Removing the Rear Brake Master Cylinder

Yamaha MT-09 2021
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4-47
REAR BRAKE
WARNING
EWA13090
Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
Refill with the same type of brake fluid that
is already in the system. Mixing brake fluids
may result in a harmful chemical reaction,
leading to poor brake performance.
When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor lock.
NOTICE
ECA13540
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean up
any spilt brake fluid immediately.
5. Bleed:
Brake system
Refer to “BLEEDING THE HYDRAULIC
BRAKE SYSTEM (ABS)” on page 3-15.
6. Check:
Brake fluid level
Below the minimum level mark Add the
specified brake fluid to the proper level.
Refer to “CHECKING THE BRAKE FLUID
LEVEL” on page 3-13.
7. Check:
Brake pedal operation
Soft or spongy feeling Bleed the brake sys-
tem.
Refer to “BLEEDING THE HYDRAULIC
BRAKE SYSTEM (ABS)” on page 3-15.
EAS30193
REMOVING THE REAR BRAKE MASTER
CYLINDER
1. Remove:
Brake hose union bolt
Brake hose gasket
Brake hose
TIP
To collect any remaining brake fluid, place a
container under the master cylinder and the end
of the brake hose.
EAS30194
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
Brake master cylinder
Damage/scratches/wear Replace.
Brake fluid delivery passages
(brake master cylinder body)
Obstruction Blow out with compressed air.
2. Check:
Brake master cylinder kit
Damage/scratches/wear Replace.
3. Check:
Brake fluid reservoir
Brake fluid reservoir diaphragm holder
Cracks/damage Replace.
Brake fluid reservoir diaphragm
Damage/wear Replace.
4. Check:
Brake hose
Brake fluid reservoir hose
Cracks/damage/wear Replace.
EAS30195
ASSEMBLING THE REAR BRAKE MASTER
CYLINDER
WARNING
EWA13520
Before installation, all internal brake com-
ponents should be cleaned and lubricated
with clean or new brake fluid.
Never use solvents on internal brake com-
ponents.
1. Install:
Brake master cylinder kit
EAS30196
INSTALLING THE REAR BRAKE MASTER
CYLINDER
1. Install:
Brake hose gasket
Brake hose
Brake fluid reservoir hose
Brake hose union bolt
Specified brake fluid
DOT 4
Rear brake hose union bolt
30 N·m (3.0 kgf·m, 22 lb·ft)
New
New
T
R
.
.

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