Yamaha 2004 WR250FS Owner's Service Manual page 244

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FRONT BRAKE AND REAR BRAKE
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Brake caliper piston seal kit
1. Remove:
• Dust seal 1
• Piston seal 2
NOTE:
Remove the piston seals and dust seals by
pushing them with a finger.
CAUTION:
Never attempt to pry out piston seals and
dust seals.
WARNING
Replace the piston seals and dust seals
whenever a caliper is disassembled.
È Front
É Rear
EC5A4000
INSPECTION
Brake master cylinder
1. Inspect:
• Brake master cylinder inner surface a
Wear/scratches → Replace master cylin-
der assembly.
Stains → Clean.
WARNING
Use only new brake fluid.
È Front
É Rear
2. Inspect:
• Diaphragm 1
Crack/damage → Replace.
È Front
É Rear
3. Inspect: (front brake only)
• Reservoir float 1
Damage → Replace.
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CHAS