Help! I put 2 new plugs in my machine and if i do not go fast and i am goin slow i allways fowl them this happen twice. I know that my machine is meant to go fast. I was thinking if i rejet her of use a hotter plug i can help the problem. Wa do u think? How big of a job is it to rejet a machine and how do u do it? How much would it cost? Thanks for the help.