103 AIR (ref: 197248)
The S1R aluminium cylinder is equipped with a 5-transfer scavenging booster exhaust ports. Aluminium provides better heat release and it is nikasil-coated. In consequence, we get a low-coefficient friction surface and a great resistance. Solid chromed steel two-ring elliptical piston. DOPPLER recommends to associate its cylinder with the DOPPLER cylinder head.
Gasket cylinder ER1 214990
Piston Ø39.94 436300
Piston Ø39.95 268399
Ring piston 193223