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Yamaha MX & Off-Road Dirt Bikes
Help please, burning piston after piston?
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[QUOTE="RobbyB, post: 1365403, member: 110302"] Sorry, no pics yet. I pulled the top end off and found that the piston was damaged slightly due to a small foreign object that made its way up one of the intake ports (a peice of piston I'm thinking). It nicked the intake side of the piston top pressing the ring groove and locking up the ring. I know for a fact that it wasn't something I left in there as I am extremely careful when working around the open crank area. And the one piston I did replace had no missing pcs. I'm sure it was a soft pc of material as there is no damage to the jug where it would have caught. The 'Reputable' shop that did the motor would have left something in the bottom end I'm sure. Where do I go from here. I was thinking about pulling the motor, adding some fuel to the bottom end and seeing if I can flush out anything else that might be in there, if anything. I checked the reeds/cage/carb and there is nothing that would have broken off from those peices. Other than the nick, the piston was not burnt, which is a good sign. Any ideas? Should this case come apart? Thanks again in advance. [/QUOTE]
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Yamaha MX & Off-Road Dirt Bikes
Help please, burning piston after piston?
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