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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Piston to Cylinder Clearance
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[QUOTE="jdon88, post: 1273378, member: 53563"] I haven't checked clearance with a feeler gauge yet, I don't want to remove the piston from the crank unless absolutely necessary....I guess I'm still hoping for someone to tell me this noise is normal....I will have a bike mechanic friend listen to it and see what he thinks but that won't be until this weekend. Its not really a scraping sound, kind of like a nail file on fingernails sound. I took a closer look thru the reed valve area while the piston goes up and down. When the top of the piston gets about and inch from the top of the cylinder, I start hearing the noise, I think it is the skirt making slight contact with the cylinder. I think the grooves/ridges on the piston is what makes the sound. Maybe smooth pistons do not make this sound? Is it normal for the piston skirt to make slight contact with the cylinder at the top part of the stroke? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Piston to Cylinder Clearance
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