Top Quality Bicycle Engine Kit, Gas Bike Convertion Kit 1) low price with good quality 2) ... kitTop Quality Bicycle Engine Kit, Gas Bike Convertion Kit Specifications Bicycle Motor Kit, Motorized Bike Gas Engine, 2 stroke, 48cc/55cc ... : CDI Ignition 5. Transmission: Steel chain 6. Max. Power(kw/rpm): 1.68/6000, 1.86/6000, 2.2/6000 ... 2.5L, 4L Top Quality Bicycle Engine Kit, Gas Bike Convertion Kit