Engine Single cylinder, 4 stroke, air-cooled Bore×Stroke(inch): 2.12” x 2.12” Compression Ratio: 9.3:1 Max Power(hp/r/min): 9.65/8500 Start Type: Kick start Carburetor: 22MM Transmission: Manual; 1N234 Final Drive: KMC #428 Chain Ignition: CDI