The luggage would most likely fit the R65 racks but the R100 racks would need some amount of modification to fit the R65. My '81 R100 came with a Reynolds rack and had the standard Krauser bags which will also fit the standard BMW racks. I guess it would also matter if the bags are Krauser or the BMW Touring bags. I think the bag-to-frame latches are different although the actual rack is the same.