I have a Raptor 50 and just put a 2-needle carb in my OS-50H. What a difference! I also bought the CY Muscle pipe and was very happy with the perf gain, but unfortunately, I can't use it because the front of the pipe (past the clamp section) hits up against my custom fiberglass canopy. Since there's no way I'm going to dremel the canopy to fit a pipe, I need another solution. Basically, it can't be longer in front than the stock pipe.
I've heard there's a new Hatori 50 size out there, but am not sure of the specs, model #, nor its size. Any suggestions?