High-quality, but cost-effective aftermarket piston for original cylinders from Italian piston specialists Meteor. The set contains a piston, gudgeon pin, piston rings and 2x gudgeon pin circlips. This piston is the same dimensions as the original item. To prolong the life of the engine, and at the same time avoid expensive repair bills, the piston should be replaced either when the power starts to drop-off, or the engine begins to “knock”. That is generally every 5-10,000km (approx. every 3-6,000 miles). Simply swap out the old piston for the new one and everything is, once again, good in the world. Suitable for Minarelli AM, Generic, KSR-Moto, Keeway, Motobi, Ride, 1E40MA, 1E40MB engines with grey cast cylinders (piston size: 40.25mm) It is advisable to order a new gasket set and little end bearings when changing the piston.