Yamaha YZF-R125 Service Manual: Checking the camshaft

Yamaha YZF-R125 Service Manual / Engine / Camshaft / Checking the camshaft

1. Check:

  • Camshaft lobes Blue discoloration/pitting/scratches 
    Replace the camshaft.

2. Measure:

  • Camshaft lobe dimensions "a" and "b" Out of specification Replace
    the camshaft.

Checking the camshaft


3. Check:

Camshaft oil passage Obstruction Blow out with
compressed air.

    Camshaft
    ...

    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 ...

    Other materials:

    Removing the fuel tank
    1. Extract the fuel in the fuel tank through the fuel tank filler hole with a pump. 2. Remove: Fuel hose connector cover "1" 3. Disconnect: Fuel hose "2" CAUTION: Be sure to disconnect the fuel hose by hand. Do not forcefully disconnect the hose with tools. A ...

    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 ...

    Avoid Carbon Monoxide Poisoning
    All engine exhaust contains carbon monoxide, a deadly gas. Breathing carbon monoxide can cause headaches, dizziness, drowsiness, nausea, confusion, and eventually death. Carbon Monoxide is a colorless, odorless, tasteless gas which may be present even if you do not see or smell any en ...

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