I completed the first engine start and a 10 mile break-in ride. You can see the details here.
VIDEO: 1983 BMW R80ST First Engine Start
1983 BMW R80ST First Engine Start
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Category Archives: Uncategorized
1983 BMW R80ST Disassemble, Rebuild, Assemble Transmission
The 1983 R80ST transmission is the same as the 1983 R100RS transmission that I rebuilt previously. So in this document, I provide links to the 1983 R100RS documents showing how I disassemble, rebuild and reassemble the transmission. I will provide pictures and details about what I find when I open up the R80ST transmission and will document any work I have to do on the R80ST that is different from the work I did on the R100RS.
I have the transmission cases vapor blasted by Colorado Vapor Blasting in Arvada, CO who is generously providing a discount to me in support of my goal of a charity auction of this R80ST to support the Motorcycle Relief Project.
Here is the link to the documentation for the transmission disassembly, rebuild and assembly including pictures of the 1983 R80ST transmission.
Here are pictures of the rebuilt transmission.
Transmission Serial Number-Z078854
Transmission Assembled-Red Tape On Fill Plug Means I Haven’t Put Gear Lube In The Transmission Yet
Transmission Assembled-Rear
Transmission Assembled-Bottom
Transmission Assembled-Front
1983 BMW R80ST Replace Steering Head Bearings
I completed this work and published a document and YouTube video showing how I do this work.
VIDEO: 1983 R80ST Replace Steering Head Bearings
1983 BMW R80ST Install Flywheel
I’ve removed the airbox, transmission and clutch to gain access to the flywheel. You can see how I did that work here.
- 13 BMW 1983 R80ST Remove Air Box & Pulse Air System
- 23 BMW 1983 R80ST Remove Transmission
- 21 BMW 1983 R80ST Remove Clutch
I also show how to remove the flywheel here.
I’ve published documents on removing and installing the flywheel on other projects. You can see those documents here.
- 11 BMW 1973 R75/5 Remove & Install Flywheel, Replace Rear Main Seal, Oil Pump Cover & Cover O-Ring
- 11 BMW 1977 R100RS Replace Rear Main Seal & Oil Pump Cover O-Ring
- 11 BMW 1983 R100RS Remove Flywheel & Rear Main Seal
- 11 BMW 1983 R100RS Install The Flywheel
Since the 1983 R80ST engine is similar in many ways to the 1983 R100RS, I will link to the 1983 R100RS documents as appropriate in this document.
Here is a short YouTube video showing how I do this work.
VIDEO: 1983 BMW R80ST Install Flywheel
Here is how things look now.
Flywheel Installed
1983 BMW R80ST Disassembly Down To The Frame
This document shows how I disassemble a 1983 BMW R80ST “project bike” down to the frame.
It has links to other documents that describe how to remove various assemblies such as the electrical system, brakes, drive train, engine etc. Although not included in this document, there will be other documents that cover details about the disassembly and rebuilding of some of the components removed in this document; e.g., the master cylinder, disk calipers, wheel bearings, etc.
I got the bike in November 2021 as a project bike. Consequently, a number of parts were not installed on the bike so I won’t be showing how to remove them. Nonetheless, I list the removal of parts in the order that I would have removed them so you can use this document as a guide for removing all the parts from the bike to strip it down to the frame.
As Delivered To Brook’s Airhead Garage
Additional Parts That Had Been Removed
After I finished disassembling it and storing parts in bins, this is what it looks like.
Disassembled 1983 R80ST With Parts In Bins