I replaced the timing chain, crankshaft sprocket and nose bearing and the three oil seals in the timing chest cover. You can read about this work here:
The procedure for the 1977 R100RS is the same as the 1975 R75/6 as no major changes in these components was made. I link to the appropriate R75/6 procedures and show differences I found in the R100RS as appropriate.
I did this work in conjunction with replacing the major engine electrical componets. You can read about that work here.
- 12 BMW 1977 R100RS Install Dyna III Electronic Ignition-Refurbish Automatic Timing Unit (ATU)
- 12 BMW 1977 R100RS Refurbish Starter Motor
- 12 BMW 1977 R100RS Replace Engine Electrical Components
Here are a few pictures and videos from the write-up.
VIDEO: Checking Camshaft Nose Runout