yeah man your gonna need a rebuild mine did that when i blew it up smokin only one pipe, and you are gonna need to get it bored some so just go with .20 over your not gonna to tell a big difference but maybe a lil and dont just rering it it will only last bout a month just go ahead and put some pistions to while your there or it will cost a lot more and dont be a dumb ass like me and ride like a bat outta hell the first day you get it back and blow it up 2times in one week that really suck