Yamaha YZF-R125 Service Manual: Checking the radiator

1. Check:

Radiator fins obstruction clean.


Apply compressed air to the rear of the radiator.

Damage  repair or replace.


NOTE:

Straighten any flattened fins with a thin, flat-head screwdriver.

Checking the radiator


2. Check:

  • Radiator hoses Cracks/damage Replace.

3. Measure:

  • Radiator cap opening pressure Below the specified pressure
    Replace the radiator cap.

a. Install the radiator cap tester "1" and radiator cap tester adapter "2" to the radiator cap "3".


Checking the radiator


b. Apply the specified pressure for ten seconds and make sure there is no drop in pressure.

4. Check:

  • Radiator fan Damage Replace.


    Malfunction Check and repair.


    Refer to "COOLING SYSTEM" on page 8-25.

    Radiator
    ...

    Installing the radiator
    1. Fill: Cooling system (with the specified amount of the recommended coolant) Refer to "CHANGING THE COOLANT" on page 3-15. 2. Check: Cooling system Leaks Repair or replace any ...

    Other materials:

    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. 3. Check: Camshaft oil passage Obstruction Blow out with compressed air. ...

    Adjusting the valve clearance
    The following procedure applies to all of the valves. NOTE: Valve clearance adjustment should be made on a cold engine, at room temperature. When the valve clearance is to be measured or adjusted, the piston must be at top dead center (TDC) on the compression stroke. 1. Remove: ...

    Checking the water pump
    1. Check: Water pump housing cover Water pump housing Cracks/damage Replace. Impeller shaft Cracks/damage/wear Replace. Bearing Rough movement Replace. Radiator outlet hose Cracks/damage Replace. ...

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