... feel the passion of water sports and recreation. The jet motor is deluxe, artistic, dynamic, and attractive. MODEL:RJ800JMEngine:2 cylinders ... ,784ccCompression Ratio:6.6:1Bore & Stroke:80mm~78mmLubrication System:variable oil injectionCooling System:water-cooledStarting System:electric startIgnition System:Ignition CDISpark ...