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how much compression??

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Posted by: 400ex18

i have an 86 250r and its bored 60 over, but how much compression should it be puttin out?? i know its low it runs like 120!


Posted by: zedicus00

160 at least.. a lot of people run thinner gaskets and milled heads, anywhere up to about 240 on race gas. pump gas is safe to around 180 or a bit more depending.




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