Originally Posted by Airhead Wrangler
...and a new project begins.
Just to dispell another internet myth: An R1100GS swingarm is neither 20mm narrower than nor the same width as a R100GS swingarm. I've heard mention of both being the case. I couldn't get a super-precise width on the R100GS swingarm, but it's just about exactly 10mm wider. An 1100 swingarm is 254mm wide.
Airhead Wrangler, I'm going to be following your progress closely as I'm about to embark on the same project. I have the 1100 swingarm, driveshaft, diff etc as well as the coupler to connect to the airhead output shaft. I understand that there is an offset issue to deal with on the rear wheel.
Keep us updated on your progress.