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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bigger piston, more compression?
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[QUOTE="Faded, post: 565261, member: 38322"] Reassemble after getting your cyl back. Gently tighten the head down. Put a piece of solder (bent into an 'L' shape) in through the spark plug hole, like if you were going to measure squish. Let the end contact the side of the bore. Hold it there while cycling the motor with the kick starter. After the piston has past TDC pull out your solder and see how thick the end is (measure it with calipers). [b]If[/b] there isn't enough relief (i.e. piston hits head) and you run it you risk damaging your motor. Or give Eric a quick call ( [url]www.eric-gorr.com[/url] ) and ask him, he'd know. If it needs the head mod he does a sweet job for not a lot of $$$. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bigger piston, more compression?
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