Yamaha YZF-R125 Service Manual: Installing the camshaft and rocker arms

Yamaha YZF-R125 Service Manual / Engine / Camshaft / Installing the camshaft and rocker arms

1. Lubricate:

  • Rocker arms
  • Rocker arm shafts

2. Lubricate:

  • Camshaft

3. Install:

  • Camshaft "1"

NOTE:

Make sure that the camshaft projections "a" and hole "b" are positioned as shown in the illustration.

Installing the camshaft and rocker arms


4. Install:

  • Rocker arms
  • Rocker arm shafts "1"

NOTE:

  • Make sure that the cutout "a" in each rocker arm shaft is facing downward as shown in the illustration.
  • Make sure the rocker arm shafts (intake and exhaust) are completely pushed into the cylinder head.

Installing the camshaft and rocker arms


    Checking the rocker arms and rocker arm shafts
    The following procedure applies to all of the rocker arms and rocker arm shafts. 1. Check: Rocker arm Damage/wear Replace. 2. Check: Rocker arm shaft Blue discoloration/excessive wea ...

    Valves and valve springs
    ...

    Other materials:

    General maintenance and lubrication chart
    TIP The air filter needs more frequent service if you are riding in unusually wet or dusty areas. Hydraulic brake service Regularly check and, if necessary, correct the brake fluid level. Every two years change the brake fluid. Replace the brake hoses every four ye ...

    Adjusting the exhaust gas volume
    NOTE: Be sure to set the CO density level to standard, and then adjust the exhaust gas volume. 1. Remove: Rider seat Refer to "GENERAL CHASSIS" on page 4-1. 2. Set the main switch to "OFF". 3. Disconnect: Self-diagnosis signal connector "1" 4. Connect: FI diagnostic tool "2 ...

    Checking the rear brake caliper
    1. Check: Brake caliper piston "1" Rust/scratches/wear Replace the brake caliper piston. Brake caliper cylinder "2" Scratches/wear Replace the brake caliper assembly. Brake caliper body "3" Cracks/damage   Replace the brake caliper assembly. Brake fluid deli ...

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