you can use the frontfender from K1200RS.
here a thread with the same question:
Kotflügel vorne 17" Umbau
Erstellt von FrankT, 24.08.2016, 07:55 Uhr · 1 Antwort · 293 Aufrufe
I am sorry I have to write in english, but my german is to bad to make sence
I am on the way to build a R1100GS Mega Motard and I have the 17" wheels from a R1150R, but I can`t find the right front fender for the project, so I will be happy to here some good sugestions for my new front fender (kortflügel)