I took apart the shee today, and i took the head off and when i did there was nothing wrong with the pistons or cyl's at all. No scratches no anything. so the reason i took apart the motor in the first place was because when i was racing every time i threw it in 5th it would just bog down and when i threw it in 6th it bogged even worse but every other gear it was fine. so i compression tested it and the left side came out to be 90lbs and the right is 60. so with nothing wrong with the internals could it be a bad port job that is throwing off the compression. idk i need some input.