The 12 is like a street-legal drag bike, I race it weekends and ride it once a week. Has full muzzys system, pc, race map, etc. Dyno'ed at 180 at the wheel. No power at all below 4k but past 6k little out there will touch it. Rear tire always slides out and it gets REALLY hot in town. I got on the 10 and it was like "git some" from 2k up. I already like it a lot, waaay lighter, handles like a dream, it should make a fun street machine. I need more time on it, I rode it home in the rain so I couldn't "open it up" yet.