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:

    Separating the crankcase
    1. Remove: Crankcase bolts NOTE: Loosen each bolt 1/4 of a turn at a time, in stages and in the proper sequence as shown. A. Right crankcase B. Left crankcase 2. Turn: Shift drum segment NOTE: Turn the shift drum segment "1" to the position shown in the illustration. In this ...

    Checking the fuel line
    1. Remove: Left side panel Refer to "GENERAL CHASSIS" on page 4-1. 2. Lift the fuel tank. (Do not disconnect the fuel hose, drain hose 3. Check: Fuel hose "1" Cracks/damage → Replace. Loose connection Connect properly. 4. Install: Fuel tank Refer to "FUEL TANK" on pa ...

    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 vehicle operation. Refer to "CABLE ROUTING" on page 2-33. CAUTION: Install the brake ...

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