Yamaha YZF-R125 Service Manual: Assembling the front brake caliper

Yamaha YZF-R125 Service Manual / Chassis / Front brake / Assembling the front brake caliper

WARNING

Before installation, all internal brake components should be cleaned and lubricated with clean or new brake fluid.
Never use solvents on internal brake components as they will cause the brake caliper dust seals and piston seals to swell and distort.

Whenever a brake caliper is disassembled, replace the brake caliper dust seals and piston seals.

Checking the front brake caliper

1. Check: Brake caliper pistons "1" Rust/scratches/wear Replace the brake caliper assembly. Brake caliper body "2" Cracks/damage Replace the brake caliper assembly. Brake f ...

Installing the front brake caliper

1. Install: Brake caliper "1" (temporarily) Copper washers "2" Brake hose "3" Brake hose union bolt "4" WARNINGProper brake hose routing is essential to insure safe vehi ...

Other materials:

Checking the piston pin
1. Check: Piston pin Blue discoloration/grooves Replace the piston pin and then check the lubrication system. 2. Measure: Piston pin outside diameter "a" Out of specification Replace the piston pin. 3. Measure: Piston pin bore diameter "b" Out of specifica ...

Checking the crankshaft
1. Measure: Crankshaft runout Out of specification Replace the crankshaft, bearing or both. NOTE: Turn the crankshaft slowly. 2. Measure: Big end side clearance Out of specification Replace the crankshaft. 3. Measure: Crankshaft width Out of specification&nbs ...

Cleaning the air filter element
NOTE: There is a check hose "1" at the bottom of the air filter case. If dust and/or water collects in this hose, clean the air filter element and air filter case. 1. Remove: Rider seat Refer to "GENERAL CHASSIS" on page 4-1. 2. Remove: Fuel tank Refer to "FUEL TANK" on page ...