Specifications: Type: 4-stroke, single-cylinder, air-cooled, OHC Bore and Stroke: 54 X 54 mm Compression Ratio: 9.47:1 Displacement: 123.7 cc Max. Power: 8.72 hp @ 7,500 rpm Max. Torque: 8.0 Nm @ 5,500 rpm Idle: 1,500 rpm Starter: Kick Starter Spark Plug: A7TC or NGK C6HSA Plug Gap: .28 or 0.6-0.8 mm Ignition System: CDI (Capacitive Discharge Ignition) Lubrication: Pressure / Spray Oil Capacity: 0.9 L (15w/40-SE) Dimensions: 18 1/4″ x 11″ x 11″ Weight: 44.1/4 lbs (engine only) Ships at 52 lbs Clutch: Wet manual clutch Gears: 4 speed (primary: 3.722 manual, 4.059 automatic) Gear Ratios: 2.833/1.706/1.238/0.958 Magneto: Permanent Magnetic Voltage: 12V Sprocket: 428 15T 20mm