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Yamaha YZ450F User Manual

Yamaha YZ450F
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Page #141 background image
FRONT BRAKE
4-15
EAS1SL5137
INTRODUCTION
EWA14100
WARNING
If you need to disassemble the disc brake
components, observe the following precau-
tions.
Never disassemble the brake components
unless absolutely necessary.
If there is any problem with connections
on the hydraulic brake system, perform
the following jobs.
Disassemble the brake system, drain the
brake fluid, and clean it. After that, add a
suitable amount of brake fluid. Then, bleed
it after reassembly.
Use only brake fluid for washing brake
components.
Use new brake fluid for cleaning the brake
components.
Immediately wipe off the spilled brake fluid
to avoid damage to painted surfaces or
plastic parts.
Handle brake fluid with special care not to
let it enter your eyes so that you may not
lost your eyesight.
FIRST AID FOR BRAKE FLUID ENTERING
THE EYES:
Flush with water for 15 minutes and get
immediate medical attention.
EAS1SL5138
CHECKING THE FRONT BRAKE DISC
1. Remove:
Front wheel
Refer to “FRONT WHEEL” on page 4-3.
2. Check:
Front brake disc
Damage/galling Replace.
3. Measure:
Brake disc thickness
Measure the brake disc thickness at a few
different locations.
Out of specification Replace.
4. Install:
Front wheel
Refer to “FRONT WHEEL” on page 4-3.
EAS1SL5139
REMOVING THE FRONT 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.
EAS1SL5140
DISASSEMBLING THE FRONT BRAKE CAL-
IPER
1. Remove:
Brake caliper piston “1”
Brake caliper piston dust seal “2”
Brake caliper piston seals “3”
Brake disk thickness limit
2.5 mm (0.10 in)
3
2
1

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Yamaha YZ450F Specifications

General IconGeneral
BrandYamaha
ModelYZ450F
CategoryMotorcycle
LanguageEnglish

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