Features: Type: 4-Stroke single-cylinder OHC air cooled Bore & Stroke: 54 X 54mm Compression ratio: 9.47:1 Displacement: 123.7cc Max. 28 or 0.6-0.8mm Ignition system: CDI (Capacitive Discharge Ignition) Lubrication: Pressure / Splash Oil capacity: 0.9L (15w/40-SE) Measurements: 18 1/4" x 11" x 11 Clutch: manual clutch-wet Gears: 4 speed (primary reduction: 3.722 manual, 4.059 Auto) Gear Ratios: 2.833/1.706/1.238/0.958 Magneto: Permanent magnetic Voltage: 12 Volt Sprocket: 428 15T 20mm.