Naraku 70cc Air Cooled Horizontal Minarelli Big Bore Cylinder Kit. Kit includes cylinder, low-friction molybdenum coated piston, piston rings, 10mm piston pin, cir clips, head gasket, base gasketand exhaust gasket. When used in conjunction with a stock crankshaft the total displacement comes out to 70cc. Suitable for use with stock or performance exhaust. Can be used with a stock cylinder head for higher compression or larger 70cc head. If used with a stock head the electric starter may have trouble turning over the engine. Fits the following models and more with horizontal Minarelli engine: