ENGINE TYPE: AIR COOLED ,4-STOKE,OHV90L, V-TWIN CYLINDER ,GASOLINE ENGINE MAX POWER(KW/3600RMP):13.4 NET TORQUE (N.M/RMP):40.8/2500 OIL CAPACITY (L):1.4 FILTER DEPLACEMENT GOVERNOR SYSTEM :CENTRIFUGAL MECHANICAL BORE XSTROKE(MM):78*67 DEPLACEMENT(CC):640COMPRESSION RATIO: 8.5:1LUBRICATING MODE: FULL PRESSURESTARTING MODE: ELECTRIC STARTCARBURETOR :HORIZONTAI TYPE BUTTERFLY VALVEIGNITING MODE: TRANSISTORIZED MAGNETO IGNITION AIR CLEANER :DUAL ELEMENT TYPEDIMENSION (MM)388X457X452DRY WEIGHT(KG) 42.