get some pro-circuits first, boysen power or pro reeds to start. when you go to build, run a 4mill woods port. you can pick up a coolhead, too, and advanced timing really helps out alot. i like +5.5, but most start with +4. don't go crqazy on the carbs either- the stock size can hang in there pretty damn good, but have water issues, so 28mm-30mm carbs would be fine, but bigger than that, you will pull teeth to get decent lowend out of them. the closest pv cyls to having good lowend is the rz setup, but they all pretty much just add a litlle mid-low to dune to drag port cyls