That looks exactly like the fairing on my 1981 R65 I bought new,but in alpine green.It is BMW part # 46631240822 in primer still available. I presently moved it to a 1983 R65LS with drop handlebars.I had to fab new longer bracket bars,notch the handlebar and turns sigal nothches out and cut rubber padding arund the guages out to make it fit tightly.I don't know if its an 81-81 or an 81R t0 83LS dimesion difference between the upper
and lower triple clamp brackets. JEG