Thanks Born Again! Great help. Red-I was thinking along those lines on hp results. The bike gets a few hp just by going with a properly jetted set of pipes. The air box should add 4-5 more hp, putting the little beast in the mid-sixties. AFter that, displacement would be the only way to get real gain. I just don't think I'm ready to hog the poor little 790 out yet. She's been very reliable as is, just want to get around 70 hp, 120 top end.