... :300CC Motorcycle engine,ATV Engine,4-stroke,vertical,water-cooled Displacement:292.4ml ------------------------------------------------------------------ Model:LC178MNType:single cylinder,4-stroke,,water-cooledDisplacement:292.4mlBorexStroke:78x61 ... simpler valve drive mechamism,less wear, lower rotational inertia, and power response performance at a htgh rotation speed, Front-mounted balance ...