Oil seal 31 x 62.1 x 5.8/4.3mm
-MALOSSI PTFE/FKM- Metal
(used for crankshaft drive side Vespa PX (since 1984), T5 125cc, Cosa)

One question we are asked is should I use a rubber or metal type oil seal, some people favor one type over the other, but the best answer we can give is that is depends on your casings, casing made for a metal seal are smooth where the oil seal fits, and earlier casings designed for a rubber oils seal have a very small groove where the oil seal fits.

Description:
Malossi uses the best materials for its shaft seals. They consist of steel cores covered with fluorinated rubber (FKM/FPM). The inner running surface, which has direct contact with the sealing surface of the crankshaft, is made of PTFE (polytetrafluoroethylene). Both materials are known under the trade names Viton and Teflon of the manufacturer DuPont. PTFE is extremely resistant to all acids, oils, greases, alcohols and fuels. Due to the increased alcohol content in today's fuel, shaft sealing rings with this material are recommended. In addition to their enormous wear resistance, they run with low friction, which makes them a must for all engines with higher speeds. Piaggio uses PTFE rings as standard in 125-180cc two-stroke engines such as the Runner or SKR. Also in the PX engines, the clutch side large shaft seal of the crankshaft is made of such a material (brown sealing lip).

Very low wear
Absolutely heat resistant
Extremely low frictional resistance
Resistant to almost all chemicals
Perfectly suitable for heavily tuned engines
Also applicable in the series engine

Oil seals
inner diameter: 31
outer diameter: 62.1
width: 5.8/4.3
sizes: 31x62.1x5.8/4.3mm
material: FPM, FKM
coating: PTFE
OEM numbers (for comparison purposes only)
Malossi 6615307B
Piaggio 242550

Vespa (Motovespa) PX 125 T5 Sport Elestart (engine 108M)
Vespa (Motovespa) PX 125 T5 Sport (engine 98M)
Vespa (Piaggio) Cosa 125 CL (VNR1T)
Vespa (Piaggio) Cosa 125 CLX (VNR1T300)
Vespa (Piaggio) PX 125 T5 (VNX5T)
Vespa (Piaggio) Cosa 150 CL (VLR1T)
Vespa (Piaggio) Cosa 150 CLX (VLR1T300)
Vespa (Piaggio) Cosa 200 CL (VSR1T)
Vespa (Piaggio) Cosa 200 CLX (VSR1T300)
Vespa (Piaggio) Cosa 200 FL (VSR1T301)
Vespa (Piaggio) P 200 E (VSX1T, -1980)
Vespa (Piaggio) PX 200 E FL (VSX1T, 1984-1997)
Vespa (Piaggio) PX 200 E FL (ZAPM18, 1998-)