Which one of these mods would be my next best investmenet? I have an 01 220, rev pipe, Boyseen reeds, with the air box removed. I'm looking for more top end without sacrificing the bottom torque. I have a damaged 220 cylinder to work with or I can send the carburetor to be bored. I'm looking for the best bang for my bucks since I have to keep myself and two sons racing.