Gaskets and seals prevent the leakage of liquids; in the case of cylinder gaskets we're talking about oil. Gaskets must be resistant to temperature and pressure, but even the best gasket will eventually leak and needs to be replaced. ... We recommend to replace all gaskets each time the cylinder is removed / reinstalled. We sell single gaskets, cylinder head and cylinder base gaskets and complete gasket sets. There is a wide range of gaskets and O-rings for original cylinders and replacement gaskets for cylinders of other brands such as Polini, Malossi or Top Performances. No matter if you ave a scooter, moped, 50cc bikes or Vespa, our shop has the suitable gasket.