Since this bike sat for more than 25 years and I found water in the oil pan, I replaced the connecting rod bearings and the oil pan and oil pump suction gaskets. The bearings were in good condition, so that was a relief. The oil pump suction gasket was brittle so it was time to replace it. None of the oil pan bolt threads were stripped, so that was a good thing. I also had the oil pan, that was painted orange by a previous owner, vapor blasted by the Colorado Vapor Blasting division of Vintage Twins, a local independent shop in my hometown of Arvada, CO. When I told them I was going to auction this bike and donate all the proceeds to the Motorcycle Relief Project, they generously provided me a nice discount on the work. 🙂
Here is a before and after picture of the oil pan.
You can read about how I do this work and see a short summary video here.
VIDEO: 1983 BMW R80ST Replace Connecting Rod Crankshaft Bearings
VIDEO: 1983 BMW R80ST Replace Oil Pan and Oil Pump Suction Flange Gasket