Ok and before I bought the bike he had a hmf pipe on it, I used to have a big bear 400 we had to jet it I don't really know much about the fuel injections this my first one to own and I've only ridin it once and loved it, you can tell they put a new cylinder on it because thats the only part of the motor that isnt stained and looks new, and do you know if it's that hard to take the top end off the motor I've done it on racing bikes but I had more room to work with.