Hiya - I searched the MOA forum a bit, sorry if I missed a prior post, but I am looking for the list that matches rear drive ratios with "W" numbers in the speedo unit. I have a 1973 R60/5 with a 37/11 rear drive. Not surprisingly, the odometer failed. I read Snowbum's articles, and some ABC tech stuff, and he nicely calculates a theoretical "accurate" ratio - but I am looking for what are the actual W numbers BMW put in the bikes ! Thanks in advance....tough to read the speedo head stamping on the /45 unit but it "looks" like 1.215, assuming the German "1" looks sort of like a funny number "7".