Quote Originally Posted by 81911SC
How much have you screwed with it before this? Float levels too low? Causing a lean mix? Lean will make it hot as shit too.

Tr00f. Sounds to me like bad lean, generally if its getting hot enough for the pipe to glow red, its cutting out in the mid-range, and backfiring its lean. I'd be willing to be it runs better with the choke on then off, richen it up a little and your problem should be solved.