that motor had 130-140 psi compression and milled about 10 thou. stock pistons 3 valve jobs had been re ringed 3 times and tons of track miles and the bandit transmission/gearing that makes 1st useless unlike the gsxr400 sp Gear box....it was cool i was dragging my knee on the exit at the end and just doing a loop over and over i had the most passes that day