I make adapters to fit old 70's/80's BMW motorcycles with modern brakes. A popular mod these days is to use upside down GSXR forks on these bikes. Some owners want to use the stock BMW wheel. To make an adapter I need to know the exact spacing from the center of the rotor or caliper on one side to the rotor/caliper on the other. I was hoping some of you could get me these measurements. Please let me know what year and model you did the measurements on. I was also hoping I could get information about any years or models that may have different spacing.