SSR Motorsports SR70C Upgraded Pit Bike - 70cc Available from GreenPowerSports 72 cc 4 Stroke, Single Cylinder, Air Cooled Engine Semi Automatic, 4 Speed Transmission Horsepower: 4.02 Rated / 4.69 Max - 7500 rpm Upgrades from SR70: Upgraded Semi Pro Hub, Upgrade Rear Shock, FR/RR Disc Brake, Hydraulic Conventional Fork