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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2000 Yz125 Weird Noise
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[QUOTE="jaguar, post: 1439250, member: 19340"] make sure the ring locator pins never cross an open port as the piston goes up and down. maybe the piston isn't standard. make sure the exhaust port has beveled edges so the ring won't snag. rings snagging the ports make a weird noise. also piston hitting the head makes a noise. look at the piston top to see if there is any bare metal that isn't coated with carbon. that would be where it is hitting. the piston rises .3-.5mm when its hot due to metal expansion. [/QUOTE]
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Forums
Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
2000 Yz125 Weird Noise
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