Why are you trying to compare a single cylinder air cooled 2 cycle engine to a valve cover for a 6 cylinder water cooled 4 cycle one ? Though any increase to the go cart engine would always be an advantage, several possible degrees on your 6 cylinder valve cover might be somewhat difficult to determine. Seems a question not needing to be answered, though I do applaud your question. Just a thought.
Doug, I wasn't trying to make any comparison. I just thought it was humorous as to the extent people will go to try and make improvements to their engines performance when its not really necessary. polishing a valve cover? Really?
