Join Date: Jul 2016
Location: Seattle, WA, USA
You on doubt have the "Adjust On the Fly" suspension? This is another extraneous option Beemer cooked up like the Servo Assist Brakes. It's such a complicated and expensive mess that most riders just get rid of it once it takes a shit. Put some Ohlins shocks on that hummer and go down the road.
I believe The Ohlins model numbers for our bikes have been discontinued but you can still find them 2nd hand on eBay and then send them into Ohlins for a rebuild. They have a facility in the Carolinas so you don't have to send them all the way back to Sweden. I saw a set of Ohlins for Beemer K-Bike on eBay recently from someone in Portland, OR for really cheap. There are also other Ohlins shocks that will fit K-Bikes just fine but have some irrelevant feature that gave them a different Part #. You will have to research this to find which will fit.
I put Ohlins shocks front and rear on my '08 1200 S like 8 years ago and have had no difficulties.