[apk919]

All kidding aside, there's no "weight limit"... you just get progressively slower as you add weight... I'm around 200 pounds, and my best friend is around 255 pounds... (he doesn't really fit well in the Exige seat). The engine revved normally, although it was noticeably more sluggish than with only me in the car.

If you notice a substantial change in power/smoothness at 6k rpm... there's a good chance you've got a problem somewhere...