Question about 2003 Yamaha YZ 125

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The clutch on my 2000 yz 125 is unresponsive. I'd appreciate any troubleshooting techniques.

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  • tombones May 11, 2010

    If you have put any synthetic lubricants in the gearbox, chances are that is the problem. Synthetics can swell the cork on the friction plates causing the clutch to stay engaged OR synthetics can lubricate TOO good and cause the clutch to slip. It all depends on what synthetic is being used. In any event, the fiber friction plates will need to be changed out. Even if the the oil is not the problem and the plates are simply worn out, the plates will need changing. But first disconnect the clutch cable from the gearbox. Does it move freely when the lever is pulled in and out? If not then get a new cable. Only use 10w40 motor oil in the gearbox, without any "special" additives.

  • mxtras
    mxtras May 11, 2010

    Clarify unresponsive, please. Do you mean it won't release or it won't propel the bike forward (engage)??

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Possibly the wrong size clutch cable... or you may have to adjust the part where the clutch goes into the engine

Posted on Nov 15, 2009

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