This is the HiSun Factory Piston Kit for the 450 Engine. It has a Bore of 83mm and a Stroke of 84mm = 454cc.Similar to the HiSun 500 but the 450 uses a 19mm Wrist Pin, 500 = 20mm. The Crank Rod is Different.
Complete with 550 Piston, Ring Set, Wrist/Piston Pin, 2 Clips, Exhaust Gasket, Head and Base and Tensioner Gasket and a DR8EA Spark Plug.
