Piston for Motorcycle: V.2 50cc cylinder kit for Kymco horizontal AC (SF10). Durable spare Naraku cylinder kit (cast iron) 50cc for Kymco scooter with horizontal engine (SF10). The Naraku piston features a molybdenum coating, which protects the cylinder and piston during the break-in period, and completely dissolves after a few hours of operation. The cylinder is suitable for stock and racing exhaust systems. The delivery includes flange sets, and the original cylinder head can also be used additionally. The thicker piston ring should be installed at the bottom. Both piston rings are marked "T" (Top), which should be facing upward.