A friend just bought a new red SV650S two days ago. It's already lowered and looks SWEET! I'm a larger rider (230 pounds) and it carries me pretty well, but it's sure not fast. I'm not convinced that the kit you referred to could boost the performance a heck of a lot. Also, the dependability would probably suffer. After all, the bike is still not going to perform like a GSXR600. Now that's what you need! Good luck!