Greetings Dan; is there a link to fast larrys? All bikes arnt equal. a 1216 with cams and carbs will need more than a stock bike. When I pulled my stock header off it was a mess inside. with only 3000 original miles it was necked down at flange(where the inside pipe is attached) to very small diameters. a true venturi effect for keeping gas velocities high at low small throttle openings. Ad 36mm cv's and smallish valve openings(cam stats). A small pipe is almost required. sandy
Fast Larry is dead. And Hindle, Akrapovic and Muzzy make the best headers for the Bandit under any circumstances. All these companies test their headers under a variety of situations before they get to market, so it's not like we're talking about K-Mart headers.
Also, trying to get headers that weren't designed for the Bandit is a exercise in futility. You might as well start with your own pipe and go from there.