I bought my first blaster a few weeks ago. Came with a .40 over vito's piston,fmf chamber ,stock silencer. I've drilled 8 1" holes in the airbox cover,Waiting on a k&n filter. I have the carb jetting fixed now (run like crap when i got it) What can be done for Low to midrange power? don't need a screamin' topend where we ride.