fortunately [or unfortunately] it's one of the few pieces on the whole bike you don't have to remove to get the cylinder off. But, by removing it, there is some free horsepower lurking in there. Note how rough & uneven the insides of all those ports & passageways are. An hour's work with a dremel or round files and some #180 paper -- blending, rounding & smoothing everything out [Don't enlarge the ports] will add power all across the band. You'll want to install a set of Boyesen 2-stage reeds while you're in there.