High-end, completely worry-free set from tuning specialists Top Performances. Aluminium cylinder with extremely hard-chromed cylinder sleeve and large 50mm bore (for 86cc) and 44mm long stroke racing crank. The modular cylinder head ensures optimal flow of coolant through the cylinder head and thus perfect heat dissapation. Also contained in the kit is: a complete crank main bearing set, exhaust reducer piece for mounting to smaller exhaust manifold diameters, racing gudgeon pin and a racing offset alternator shim. The Top Performances baseball cap is also supplied. This represents a saving over ordering these parts individually.