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Post by renagade281 on Jul 19, 2016 19:47:33 GMT -5
so a customer brought me a yamaha ttr-90 and said it was running fine and then it wouldnt start or go... i checked compression and it is at 15... not good at all... anyone have any experience on this?
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Post by nelson on Jul 20, 2016 21:51:43 GMT -5
If there is no compression its most likely rings. Could be timing chain that messed up valve timing may have hole in piston. I would start by removing the head since you have already done a compression test. Is there oil in it??
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Post by renagade281 on Jul 24, 2016 4:52:18 GMT -5
yes there is oil in it. they said they changed the oil then it started smoking real bad and now it wont start..the engine just turns and turns.... i quoted him 250 parts and labor for a whole top end rebuild but he said he was just gonna take it back to yamaha and trade it in for a 125
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