Yamaha YZF-R125 Service Manual: Checking the timing chain and timing chain guide

Yamaha YZF-R125 Service Manual / Engine / Crankcase / Checking the timing chain and timing chain guide

1. Check:

  • Timing chain Damage/stiffness Replace the
    timing chain and camshaft sprocket as a set.

2. Check:

Timing chain guide (intake side) Damage/wear Replace.


Checking the oil strainer

1. Check:

Oil strainer Damage   Replace.


Contaminants Clean with solvent.


    Checking the crankcase
    1. Thoroughly wash the crankcase halves in a mild solvent. 2. Thoroughly clean all the gasket surfaces and crankcase mating surfaces. 3. Check: Crankcase Cracks/damage Replace. Oil de ...

    Checking the bearings and oil seal
    1. Check: Bearings Clean and lubricate the bearings, and then rotate the inner race with your finger. Rough movement Replace. Oil seal Damage/wear Replace. ...

    Other materials:

    Periodic maintenance and adjustment
    Periodic inspection, adjustment, and lubrication will keep your vehicle in the safest and most efficient condition possible. Safety is an obligation of the vehicle owner/operator. The most important points of vehicle inspection, adjustment, and lubrication are explained on the followin ...

    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 ...

    Shifting
    Shifting Shift pedal Neutral position Shifting gears lets you control the amount of engine power available for starting off, accelerating, climbing hills, etc. The gear positions are shown in the illustration. TIP To shift the transmission into the neutral position, press the ...

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