I've done the free mods, DR D exhaust, opened the airbox, rejetted and I run 12/52 gearing. I don't care much about the top end but it still just doesn't have much snap on the bottom. What can I do, I'm even thinking about a big bore kit although I'd have to pay to have anything like that installed as I'm mechanically challenged. Would you recommend a big bore kit (if so what kind and where to get) or maybe a YZ cam (where to get). Help please, I'm desperate. If I don't get some more power out of it I'll have to think about a 450, but I'm only 165 ibs and would rather stay on a 250. Thanks!