He's making a few designs of pipes. The one he has now really makes a huge difference. He'll be also making higher compression domes. I rode his bike last week after all the mods and that sucker pops wheelies when you dump the clutch. It hits top speed in a matter of seconds. So far he's ported the cylinder, installed a high compression dome, upgraded the wrist pin bearing, tuned pipe and a HP carb. I know I'm taking my motor apart for the race on the 27 of January.