Yamaha FZR400 1988-1989 Service Manual page 254

FRONT AND REAR BRAKE (CHASJ ebbI
Remove steps:
Blow compressed air into the tube joint
??
opening to force out the piston from the
caliper body.
Never try to pry out the piston.
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Cover the piston with a rag. Use care so that
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piston does not cause injury as it is expelled
from the cylinder.
Rear Brake
1. Remove:
Brake hose @
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Place the open hose end into a container
and pump the old fluid out carefully.
2.
Remove:
Retaining bolts @
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Brake pads @
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Pad spring
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Refer to the "BRAKE PAD REPLACE-
MENT"
3.
Remove:
Piston @
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Piston seal @
??
Dust seal @
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section.