Question about 2003 Yamaha YZ 125

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Loss of compression with dtr 125, kick start

Sudden loss of compression with DTR125, kick start really light?

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Change the rings anyway then you know if its them,cheap and easy to replace

Posted on May 14, 2009

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Take it for a compresion test, take the sleeve of look for broken Piston rings.

Posted on May 14, 2009

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It could be a number of things,difficult to say on bike engines,it could be the rings have collapsed,piston damaged or gudgeon pin broken.It will be best if you open engine and check internal parts and take it from there,it will work out cheaper

Posted on May 14, 2009

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