Well, all the work on the rear of the engine is finished as I have completed installing a new clutch provided for free from Euro MotoElectrics who offered to provide free parts for this charity rebuild project to benefit the Motorcycle Relief Project.
Here is the link to the document about how I did this work.
And here is a short YouTube video showing the procedure.
VIDEO: 1983 BMW R80ST Replace Rear Main Seal
I had a real problem removing the seal on this bike using my usual approach with the Cycle Works rear main seal tool, and had to resort to using “a bigger hammer”. I used a hook seal puller to pry the old rear main seal out of the bore. Since the bike has been sitting for 25-30 years, the seal was really stuck in the bore.
Cycle Works Rear Main Seal Tool
Using Hook Seal Puller To Remove Rear Main Seal
Using Flashlight To Verify Seal Is Flush With Case
Since this project bike was not running when I picked it up and had been sitting outside for awhile, I don’t know what components of the electrical system work. So I remove the starter motor and test it.
What The 1983 R80ST Looked Like When I Found It
Here is the link to the documentation on how I do this work and a short YouTube summary of the process.