Specifications: 1) Engine model: HS139FMB-D 2) Engine type: single cylinder, 4-stroke, air-cooled 3) Max. output and rotating speed: 4.2/8500kW/rpm 4) Max. torque and rotating speed: 3.0/6500N.m/rpm 5) Cylinder bore: 39mm 6) Stroke: 41.4mm 7) Gearshift: four gears, gear drive transmission by foot gear ratio 8) Ignition type: CDI 9) Displacement: 39ml 10) Compression ratio: 9.0:1 11) Carburetor: piston type PZ17A 12) Lubrication system: 15W/40-SE four stroke engine oil 13) Seat height: 600mm 14) Tire: front 90/65-10; rear 145/50-10 15) Oil capacity: 1.8L 16) Dimensions (L x W x H): 1500 x 600 x 800mm