Malossi FKM/PTFE High End Crank Seal Set for Aprilia / Piaggio 50cc 2T (except Ditech).
Malossi oil seals include the following design features:
Oil Seal Ø 19X30X7 mm Transmission side.
Oil Seal Ø 18X28X7 mm Flywheel side.
The contact area between the sealing lip and the rotating component that passes through the oil seal hole is the most important and therefore the most protected. The contact between the lip edge and the shaft is guaranteed by the spring and the walls (the membrane and the lip), which ensures that there is interference between the two components that is required for the development of the essential radial force to guarantee an optimal seal. After a brief period of use, the edge of the sealing lip is modified and allows a thin film of fluid to be created between the shaft and the lip which, by preventing direct contact between the two components, facilitates lubrication and prevents oil leakage, exponentially increasing the lifetime of the ring.