Yamaha YZF-R1(B) 2012 Service Manual

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Contents

REAR BRAKE4-517. Check:• Brake pedal operationSoft or spongy feeling → Bleed the brakesystem.Refer to “BLEEDING THE HYDRAULICBRAKE SYSTEM” on page 3-17.EAS22590REMOVING THE REAR BRAKE CALIPERTIPBefore disassembling the brake caliper, drainthe brake fluid from the entire brake system.1. Remove:• Union bolt “1”• Copper washers “2”• Brake hose “3”• Brake caliper “4”TIPPut the end of the brake hose into a containerand pump out the brake fluid carefully.EAS22600DISASSEMBLING THE REAR BRAKE CALI-PER1. Remove:• Brake caliper piston “1”• Brake caliper piston dust seal “2”• Brake caliper piston seal “3”▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Secure the brake caliper position with apiece of wood “a”.b. Blow compressed air into the brake hosejoint opening “b” to force out the piston fromthe brake caliper.WARNINGEWA13550• Cover the brake caliper piston with a rag.Be careful not to get injured when the pis-ton is expelled from the brake caliper.• Never try to pry out the brake caliper pis-ton.c. Remove the brake caliper piston dust sealand brake caliper piston seal.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS22640CHECKING THE REAR BRAKE CALIPER1. Check:• Brake caliper piston “1”Rust/scratches/wear → Replace thebrake caliper piston.• Brake caliper cylinder “2”Scratches/wear → Replace the brake cal-iper assembly.• Brake caliper body “3”Cracks/damage → Replace the brakecaliper assembly.• Brake fluid delivery passages(brake caliper body)Obstruction → Blow out with compressedair.Recommended brake componentreplacement scheduleBrake pads If necessaryPiston dust seal andpiston seal Every two yearsBrake hoses Every four yearsBrake fluidEvery two years andwhenever the brake isdisassembled