@ blasterboy06 its not that expensive if its your concern.. you can buy a 14T sprocket for around 13-14$ bucks.. and you can also drop the back sprocket too.. also if you have the steady hand, and tools you can do your own clean up port,your probably thinking how to do it, well all you have to do is really remove all that carbon on the exhaust port, get it to a smooth finish, also on the intake port you can smoothen it out some and get some power out of it. im thinking about doing the same thing.