i have an 06 zx10, a few engine mods but nothing internal and no power adders. i have a set of 9" extensions on it but as i am learning how to leave and tune my suspension it is getting harder and harder to keep the front end on the ground. i wanted to get a stretched swing arm and ditch the extention links but cant figure out how much of a stretch to run. i eventually will want to run nitrous, i weigh around 180 suited, and havent put on race fairings or anything yet