I have been looking around on here for a few weeks after buying my first two stroke from a friend. This blaster is bored "80" over and has fmf header and muffler on it. I had to put main seals in it and a clutch basket. I dont think the jetting is right as it wont stay running:-/ But other improvments so far I have made to this bike have been the 400ex rear shock and yfz450 heal guards and walmart lights all seem to be excellent upgrades on this quad for a budget 8-|