Re: Shift Kit: Do I need a left side sprocket?
SBP shift kits transfer power to the right side of the bike, by use of a jackshaft, another common name for the kit. A freewheel chainring (crank) is included and required, to keep the pedals from spinning. The left side chain, the one coming out of your engine, will only span a few inches to the jackshaft, there will be no sprocket on the left side of the wheel.
Depending on your motor, other options might be available, but for a twostroke ChinaGirl, options are limited.