Thanks guys for the info. I Think I'll just wait and try to get a slip-on. I don't really want to re-jet and I like where my power range is now. I have a 250 ninja also. I made an exhaust for it from a damaged cbr600. It was a devilbikes carbon fiber slip-on. I rode it for awhile with out re-jetting and it ran fine. I eventually re-jetted but it didn't make a difference. I have a welder and plenty of mechanical ability... If I were to just buy a canister is there an actual difference between a slip-on and a full system(excluding race)? I think if I made my own I wouldn't have to re-jet that way either. Can anyone give me the dimensions on their aftermarket cans? It'd save me alot of time on research. I'd need: inlet diameter, can diameter, outlet diameter, and length. I can get a universal clamp for hanging it on the bike. Well it looks like I've set myself on a quest for making another one-off exhaust.