Hello, new member here. I have a '76 R90/6 that I am for the most part, happy with. I has about a bazillion miles (dead odometer/speedo). I also have a non running '77 R100S that is locked up, missing parts and in general, a parts bike.
Question is: I would like to put the front forks from the R100S on the R90/6 in order to run dual discs up front. I would also like to replace the rear drive unit to get a little more top end speed and to also be able to use the speedo/odo. There are other various and sundry items that I would like to switch over. However!!!! Would I be compromising whatever collector value that the R90/6 might have by doing this?