1983 BMW R80ST Install Swing Arm, Rear Drive, Monoshock

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.

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

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.

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

Here are some before and after pictures.

Original Rear Shock

Original Rear Shock

Original Rear Drive

Original Rear Drive

Original Swing Arm, Rear Drive & Monoshock

Original Swing Arm, Rear Drive & Monoshock

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

All Done

All Done

All Done

All Done

 

3 thoughts on “1983 BMW R80ST Install Swing Arm, Rear Drive, Monoshock

  1. nice to meet you
    1977R100RS
    There is an aluminum gasket on the cylinder base.
    why?

    Need to rebuild?

    can i just use the o-ring?

    There is a gap between the cylinder and the block

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