Yamaha YZF-R125 Service Manual: Checking the front brake master cylinder

Yamaha YZF-R125 Service Manual / Chassis / Front brake / Checking the front brake master cylinder

1. Check:

  • Brake master cylinder Damage/scratches/wear Replace.

  • Brake fluid delivery passages (brake master cylinder body) Obstruction Blow out with
    compressed air.

2. Check:

  • Brake master cylinder reservoir Cracks/damage Replace the brake
    master cylinder.
  • Brake master cylinder reservoir diaphragm Damage/wear Replace.

3. Check:

  • Brake hose Cracks/damage/wear Replace.

Assembling the front brake master cylinder

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.
    Removing the front brake master cylinder
    NOTE: Before removing the front brake master cylinder, drain the brake fluid from the entire brake system. 1. Disconnect: Front brake light switch 2. Remove: Brake hose union bolt Copp ...

    Installing the front brake master cylinder
    1. Install: Brake master cylinder "1" Brake master cylinder holder "2" NOTE: Install the brake master cylinder holder with the arrow mark "a" pointing forward. Align the end of the br ...

    Other materials:

    Assembling the water pump
    1. Install: Water pump seal "1" (into the water pump housing "2") CAUTION:Never lubricate the water pump seal surface with oil or grease. NOTE: Install the water pump seal with the special tools. Install the water pump seal with the special tools to the specifi ...

    Installing the swingarm
    1. Lubricate: Bearings Spacers Dust covers Pivot shaft 2. Install: Bearings "1" 2. Swingarm A. Left side B. Right side 3. Install: Swingarm adjusting collar "1" Swingarm "2" Pivot shaft Pivot shaft nut "3" a. Install, and then fully turn in the swingarm adju ...

    Protective apparel
    The majority of fatalities from motorcycle accidents are the result of head injuries. The use of a safety helmet is the single most critical factor in the prevention or reduction of head injuries. Always wear an approved helmet. Wear a face shield or goggles. Wind in your unprotecte ...

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