Rebuilt the top end on my sons 03' CR125 two weeks ago Complete OEM top end gaskets and everything . With a new OEM cylinder from Honda. Started it up and was super boggy so i figured it was jetted wrong since the old top end had over 40 hrs. and the pretty drastic weather change . I never really messed with it until today got the carb issues all straightened out and runs great. I figured i would check compression , write it down and use it for comparison later after he got some time on it . I checked it with a brand new Craftsman compression tester and could only get it to 110 psi. Throttle wide open , reeds look good ( newer Vforce ) Just has me stumped any ideas ?