Hello !
I bought one like yours, new, in 1984. It was a 1982 model which sat unused in the dealer's shop for 2 years.
At that time, the R65 did not sell well because of the lack of fairing, and in France it was a mess.
So BMW devised an Rt fairing for the R65 and offered it as an option.
I bought it like that.
For her 30th birthday I naked her and restored it's pure look.
If you want to remove the fairing, you need the headlight, its support, a pair of flasher, a couple of fork guide for the brake tubing, and a lot of patience and work.
The front wiring is a little different(a little longer) and you have to reroute the parking light wires into the headlight. The headlight is the big bore model and too big for the R65 bracket. So you've to buy or exchange yours, bucket included...
Normally you've got the RT handlebar which is higher than the stock R65. But this is not a big problem. (you have to know this when ordering clutch cables or carburettor cables)
Hope this helps.
P.S; I had somewhere the French advert for the option, but can't find it at the moment...
P.S. 2 : The LS sold worse so to sell the last remaining stock a lot of them where refurbished with the RT fairing making them less rare than the plain R65 in RT disguise.