Good idea Dan, a sticky for it too.
Other than SBP being Sick Bike Parts LLC - Performance parts for your motorized bicycle
that sell the Jackshaft shift kit and and Expansion Chamber among other things.
CDI is Capacitor Discharge Ignition, it that little black box with the plug wire coming out and a pair of wires you need to hook to your motor.
That is all that I have right at moment. It's been a long day.