BT100 100cc 2-Stroke Motorized Bicycle Engine Kit

This BT100 complete 2-stroke motorized bicycle engine kit includes a single-piece cylinder with open transfer ports, a three-ring piston, standard NT racing carburetor, chrome muffler, CDI, spark plug, fuel tank, fuel system hardware, twist throttle with kill switch, clutch lever and cable, chain, chain guard, chain tensioner, and a 44-tooth rear drive sprocket. The kit uses a 50 mm bore and 40 mm stroke, with a listed 100cc designation and 78.6cc actual displacement.