We raced an 04, still racing it, since 2007. No oil mod done, no throttle issues and I do all the servicing on it year after year and the valves are in spec each and every time. I don't know if we got lucky or what but it flat out rips, gets the holeshot every time and it's a bone stock engine other than the cam mod. If you set the carb up properly with no stupid zip tie mod and jet it properly it never has a bog issue....ever. Key is the leak jet and needle. They are dirt cheap to find and parts are almost as easy if not easier than finding honda parts. If you do decide to get one find an 07 and up as it does have the oil mod done and the suspension on the rear is a little better.