I've got an '81 Columbia Medallian top tank that I started fixing up last year, then set aside because it needs some cables. If I remember correctly, it has a Sachs engine.
I've got a friend who owns a bicycle shop that can probably fix me up with the cables. This would be an extra bike, for my kids to play with, or in case my Honda ever lays down (not likely!).
I took the plastic tank off and cleaned it, replaced the fuel lines, installed an inline shutoff and an inline filter. Took the carb apart, and it was full of this yellowish chalky stuff. I scraped it all out, cleaned out everything with carb cleaner and WD40 and compressed air.
My question is, has anyone ever had a carb this dirty, and then gotten it to work right?
I'd like to make this project as cheap as possible. I don't like this bike as much as I do my '87 Elite, but top tank mopeds are starting to grow on me, and it would be fun to have an extra bike around.