1980 Sachs Prima with 505D. Currently working to restore this Moped for a Friend /
Tearing-down the engine. I'll be replacing bearings, seals, o-rings, gaskets, piston rings, cir-clips, etc.
I have already ported and honed the cylinder, and will be reworking the transfer ports of the case next, once I remove all
of the internals. I am also replacing the original tiny square Bing carb, with one of my Special Edition Mikuni carbs,
with free-flow air-filter. This will not be a kitted screamer, however, it should have more torque than stock