This R80ST came with no right exhaust header or collector box. I decided to replace the entire exhaust system as the rear muffler and left header had a fair amount of rust.

Here is the new exhaust system installed. I’ll install the muffler heat shield when I get the side panels back from the painter.

This is a link to the documentation and a short YouTube video summary of how I do this work.

• 18 BMW 1983 R80ST Install Exhaust System

VIDEO: 1983 BMW R80ST Install Exhaust System

The left side crash bar on the R80ST includes a bracket for the side stand. So I start by installing the crash bars, then the side stand. Then I put the bike on the side stand and install the center stand.

Here is how I removed all those parts.

• 46 BMW 1983 R80ST Remove Center Stand, Crash Bars and Side Stand

Here is the documentation and short summary video showing the installation.

• 46 BMW 1983 R80ST Install Crash Bars, Side And Center Stand

VIDEO: 1983 BMW R80ST Install Crash Bars, Side And Center Stands

When I got the bike, it had no carburetors. I show how I remove the airbox in this write-up.

• 13 BMW 1983 R80ST Remove Air Box & Pulse Air System

I found a useable set of used carburetors and I rebuilt the carburetors as shown here.

• 13 BMW 1983 R80ST Rebuild, Refinish Carburetors

Here is a link to the documentation and a YouTube video of how I do this work.

• 13 BMW 1983 R80ST Install Carburetors, Cables, Air Box

VIDEO: 1983 BMW R80ST Install Carburetors, Cables, Airbox

The rear brake on the 1983 R80ST is a drum brake.

Here is a link to the documentation and a short YouTube video summary of how I do this work.

• 34 BMW 1983 R80ST Install Rear Brake

VIDEO: 1983 BMW R80ST Install Rear Brake

Here is the final product.

I had the rear drive rebuilt by a friend of mine, Matt Iles, who owns Iles Motorsports and is a long time BMW mechanic. You can read about how he did this work here.

• 33 BMW 1983 R80ST Rebuild Rear Drive

I replaced the swing arm bearings and you can read about how I do that here.

• 33 BMW 1983 R80ST Replace Swing Arm Bearings

The R80ST has a monoshock rear suspension instead of the traditional dual shock suspension that was on all the other airhead bikes I have worked on. So the swing arm is a bit different. The procedure for installing the swing arm and rear drive on the 1983 R80ST is the same as for the 1983 R100RS.

Here is the link to the documentation and a summary YouTube video.

• 33 BMW 1983 R80ST Install Swing Arm, Rear Drive, Monoshock

VIDEO: 1983 BMW R80ST Install Swing Arm, Rear Drive, Monoshock

Here are some before and after pictures.

Here is the R80ST with the swing arm, rear drive and monoshock installed. It’s starting to look like a real motorcycle again. 🙂