Need help with a old 73 cheetah 400 kawa motor. Ran great last year after i rebuilt the carb, and resealed the engine including crank seals. This year wont run. Starts, runs great for a minute and just flat out dies and wont resart. Gets fuel, not loosing spark. Compression is 130psi PTO side and 85psi MAG side. Is this symptoms of low compression in that cylinder? I mean its low i know that, but it was low last year and ran great! I know i have some scoring and damage in that cylinder but its really not any lower than last year. When trying to restart it will backfire and spit sometimes, and may restart but usually will not. Any idea's??