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Dirt Bike Brands - Other
Lost Compression on a 400
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[QUOTE="rbsdsu, post: 744298, member: 52017"] 1st off I am a newbie to this site and I would like to say hello, I am Ryan and I live in So Cal and I ride as much as possible! That being said, I have a buddy who has a YZF 400 that has lost almost all compression, I can not find TDC and when you do kick it over you get nothing or maybe a backfire... So we tore it down the other night to find that the cams and valves were all fine upon going deeper I found what I hope to be the problem! The cylinder wall which has that plating on it has been completely worn of in 2 distinct areas and I can feel some pretty good gouges with my finger nails. My initial impression was that these are extremely high compression engines and that must be the cause.... I hope! Anyways I was just hoping to get some back up on my diagnosis. Does anyone know where I can have the plating re-done, 2nd would it be a good idea to have a new piston and ring set to install??? I appreciate all of the info you guys offer Thanks... [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Lost Compression on a 400
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