Motorized Pocket Bike, TT-8081 Engine Type: Single cylinder; 4 stroke; air-cooled Max output and rotating speed: KW /（r/min）4.2/8500 Max torque and rotating speed: N.m /(r/min): 3.0/6500 Cylinder bore: 39mm Stroke: 41.4mm Gearshift: four gears. Gear drive transmission by foot gear ratio Ignition type: CDI Displacement: 39ml Compression Ratio: 9.0:1 Carburetor: Piston type PZ17A Lubrication system: 15W/40-SE four stroke engine oil Seat height: 600mm Tire: front 90/65-10 rear 145/50-10 Oil capacity: 1.8L LXWXH: 1500mmx600mmx800mm G.W: 88KG Carton Size:1490mmx455mmx860mm Container Load: 34/118pcs 20'/40'H