My 98 yz125 has low compression and i am wondering how much it is suppose to have

I had a similar problem check to make sure the rings line up right and if that dosent work let me know

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Pull started? on a YZ 125?
The power valve will not allow high RPM power if it is gummed up.
Low compression is due to bad rings, a different problem.
You may have both problems.

anything over 70 psi will be just fine to make it run. But there can be a few difrint things that you should look at as well. pushrod adjustment is the first thing i would check, if compression is low.