High-quality replacement piston for the 70cc original and 70cc NARAKU cylinder kits for Minarelli 1E40QMB engines with 12mm gudgeon pin. Delivered as shown with piston rings, gudgeon pin and circlips. Molybdenum-coated to protect the cylinder during the all-important run-in period. It is a good rule to change the piston in 2-stroke engines after about 6,000 miles. This will help engine performance and reduce fuel consumption.