Type :2-Bore,4-Stroke,Liquid-cooled Bore x Stroke :76mm×71mm Displacement : 644 cc Compression ratio:8.4:1 Max Power :20.6kw/5300rpm Maximum Torque :44/2700~3300Nm/r/min Starting :-Electric Ignition:C.D.I Lubrication:Force & Splash Transmission :manual clutch, 4 shift/Reverse Plug gap :0.7±0.1mm Lubricate oil :SAE-15W/30 Fuel tank :28.0L Climbing :30° Top speed: 58 miles/h (or limited as customers require) Front and rear tire: 25×10-12 /25×8-12 Front Suspension:Independent Dual A-Arm Rear Suspension : Independent Longitudinal Control Arm Final Drive : shaft driven Overall dimensions (L x W x H): 2,830 x 1,340 x 1700mm N.W :420kg G.W:450kg