I recently installed a TTP firestarter stage 2 ignition module. Huge improvement over the OEM unit. I spent way too much time fooling with a procom unit, which had great performance, but major starting issues. Running flat slide carbs do not make it easier! Lots of back and forth between the procom and the OEM.

this TTP unit starts right up, idles better, and winds out faster.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter