I just bought a used mrp exhaust for my keywest,its in great shape i wanted to know what size main jet i should go up to and what do i do with air cleaner frm factory exhaust,my car is a 19mm tk carb frm partsforscooters.com,i havent took carb apart so i dont know whats in there to begin with,i have 8gr rollers in the variator so i know ill have to run lighter weights thanks again for any help
