well now i think im in trouble i took apart the engine just to check for visual damage and everything looked perfect but im a beginner on nitro engines. welll i cleaned everything up and put it back together and now it has unreal compression not sure what i did but it does run or at least crank but its late here and i will try it tomorrow and see if i did something wrong. Anyone ever ran into this? and all i took off was back plate where pull start is and the cooling head. I did not remove the piston and sleeve