I did a mild port on my HT engine cleaned up the buildup on the piston and cylinder head. before starting it I noticed that the engine was much easier to turn over while the spark plug was in.I can almost get it to start just by turning the tire with my arm while hold the bike up with the other. WHile riding it i noticed that the power is way down. . in porting the motor I widened the exhaust ports and lowered the intake port. i did not touch the top of the exhaust port. maybe that my file removed about .5m off accidently. But even when i added epoxy to the roof of the exhaust I still had low power. is it possible
that the carbon buildup was responsible for the stock performance?
that the carbon buildup was responsible for the stock performance?