Per the Ian Falloon book BMW Boxer Twins, “[for 1981] The R100RT and R100RS continued with a similar style, and the R100S evolved into the R100CS.”

I certainly get the appeal, but fwiw I intend to ride both.. my wife rides with me on the K, and will keep the R to myself.

another noob, but not to bikes or BMWs Picking this up soon: 78 R100/7 with twin plug RS motor, RS front end, Dyna electronic ignition Been r...