Yamaha FZ1-N Service Manual

Contents

FRONT BRAKE4-25EAS22220INTRODUCTIONWARNINGEWA14100Disc brake components rarely require dis-assembly. Therefore, always follow thesepreventive measures:• Never disassemble brake componentsunless absolutely necessary.• If any connection on the hydraulic brakesystem is disconnected, the entire brakesystem must be disassembled, drained,cleaned, properly filled, and bled afterreassembly.• Never use solvents on internal brakecomponents.• Use only clean or new brake fluid forcleaning brake components.• Brake fluid may damage painted surfacesand plastic parts. Therefore, always cleanup any spilt brake fluid immediately.• Avoid brake fluid coming into contactwith the eyes as it can cause seriousinjury.• FIRST AID FOR BRAKE FLUID ENTERINGTHE EYES:• Flush with water for 15 minutes and getimmediate medical attention.EAS22240CHECKING THE FRONT BRAKE DISCSThe following procedure applies to both brakediscs.1. Remove:• Front wheelRefer to "FRONT WHEEL" on page 4-8.2. Check:• Brake discDamage/galling → Replace.3. Measure:• Brake disc deflectionOut of specification → Correct the brakedisc deflection or replace the brake disc.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Place the vehicle on a suitable stand sothat the front wheel is elevated.b. Before measuring the front brake discdeflection, turn the handlebar to the left orright to ensure that the front wheel is sta-tionary.c. Remove the brake caliper.d. Hold the dial gauge at a right angle againstthe brake disc surface.e. Measure the deflection 1.5 mm (0.06 in)below the edge of the brake disc.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲4. Measure:• Brake disc thicknessMeasure the brake disc thickness at a fewdifferent locations.Out of specification → Replace.5. Adjust:• Brake disc deflection▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Remove the brake disc.b. Rotate the brake disc by one bolt hole.c. Install the brake disc.Brake disc deflection limit0.1 mm (0.004 in)Brake disc thickness limit4.0 mm (0.16 in)