You know, being retired just seems to leave no time to work in the shop. I end up doing all sorts of things and the next thing you know, time for bed. Anyway, I finally wrote up the Bing carburetor rebuild/refinish work I did on the 1983 R100RS project.
When I rebuilt a 1973 BMW R75/5, I covered the procedure I used to rebuild the Bing type 64 carburetors, which are 32 mm, and the Karcoma petcocks. The R100RS has type 94 carburetors that are 40 mm and the Karcoma petcock outlet is 90 degrees from the inlet instead of directly underneath the inlet as for the R75/5. After 10 years, the designs are essentially the same, but there are some differences which I cover in the procedure write-up.
Here is the link to the R100RS Bing type 94 rebuild/refinish procedures.
The R100RS write-up contains links to the R75/5 procedures for the Bing type 64 carburetor and notes any differences or changes in how I did the work on the R100RS carburetors. Here is the link to the R75/5 type 64 carburetor rebuild/refinish procedures.
The combination of these two write-ups covers the type 64, 32 mm (64/32/10, right side and 64/32/9, left side) and the R100RS type 94, 40 mm (94/40/114, right and 94/40/113, left) carburetors.
I hope this material makes it straight forward for folks to rebuild these carburetors who may have been afraid to tackle a carburetor rebuild. Here are some before and after pictures of the carburetors.
Before Rebuild/Refinish
Before-R100RS Type 94 Left Carburetor
Rusty Screws and Cap on Dome
Grunge and Fuel Stains
Float Bowl Removed, Missing Paint on Emblem
After Rebuild/Refinish
Engine Side of Restored / Rebuilt Carburetor
Top Side of Restored / Rebuilt Carburetor
Outlet Side of of Restored / Rebuilt Carburetor
After-R100RS Type 94 Rebuilt and Refinished Carburetor