I have to agree with CrazyHerb, Quit stewing and go have fun. As far as quick and easy hop-ups go I gained about 700rpm by opening up the baffle in the muffler and enlarging the exhaust pipe. You will have to do some welding for this. Just use a grinder on the seam around the muffler to open it up. Make sure when your done that there is no way for oil to pool in the muffler.

Cvan