I get a lot of phone calls and inquiries about OSSA DMRs. We have one in our inventory and I have restored two others as close to original as possible. We were fortunate enough to come across DMR #106 that was displayed at the AMA museum during a Dick Mann exhibit. This bike was the most original we’ve ever seen, supposedly never started! So we consider it a model for all 5-speed restorations. Check out the pics!
I’ve not had the pleasure of restoring a 4-speed model to date but I have some pictures of Doug McMahon’s very original DMR # 8. Please note the crossover linkage for the shifter, rear wheel hub, engine mounts to house the 4-speed engine and swing arm is a slightly different width in the pivot area!
I’ve also recorded some 5-speed information/details on the page shown below which may assist in your restoration.
