KDXRIDER.NET

I did a compression check on my KDX200 and it came out to 175psi.

I didn't warm up the bike before I started, so it was a cold test.

Also, on my tester itself, the part that screws into the spark plug hole is much shorter than the length of threads on the spark plug itself.
Could the the test results be skewed if it doesn't thread in as deep as the spark plug?

As long as the tester was screwed in good I don’t think so. 175 cold is good.

As long as the tester is not leaking around it then you're fine. As said, 175 is good

Thank you, Vossman and Bufftester

I have always heard that the length of the tester (ie threads) can skew the results but the secret to compression testing is consistency. You can't really look for any magic number as there are WAY too many variables. The key is always doing it the same way (hot or cold, same tester, etc.) and looking for percentage drops in the result. Just keep a log of your results and compare over time.