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What should the compression be on a 1989 KDX200?

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just bought a 1989 kdx200 and the compression is between 167-170 ish. is that good for that motor? what is it usually with a new top end? and what is the lowest those motors will run with? thanks

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ok thanks dirt duchess! the guy i bought it off of says its never been rebuilt ever so i guess it hasn't been used much

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Mine was showing 168 after my last rebuild with a re-plated cylinder. Usable range according to my 89 service manual is 119 - 185psi.

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thanks juliend its good to know the range its use able in. i think mine will be good for years with 170

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Well I don't know how mine has 170 than and I've tested it with 2 diffrent guages and its the same lol I guess its just got good compression from the factory.

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