Posted: Mon Jul 26, 2004 10:32 pm
The compression on T11 (and T1) should be 9.5kg/cm2 (that's 135psi) at 300rpm (starter speed) with throttle wide open. If you get below these figures, squirt a small amount of oil into the spark-plug hole and re-test. The oil will seal the rings so if your numbers increase, your rings are the problem. If the numbers don't change then your valves are the problem.