They are using these on the RK an sg has any one tried this system on a sportster

 

I had a set on my FXR for a while, which weighs only 50lbs more than the Sportster. Not too bad of a ride. They're certainly better then stock Sporty shocks. IMO they ride a lot like Progressive 412's. It's really nice to be able to raise & lower the rear on-the-fly.

I'm surprised more Sporty owners don't go this route.