Hi I need some help distinguishing between an R60 and an R75 engine. I bought a sidecar bike with a refurbished BMW engine in it, supposedly with a 750cc engine (well, that is what I paid for). The builder claimed it is an R75 (750 cc) but he put an R60 badge on it because he had "run out" of R75 badges. The builder puts various sizes of BMW engines in CJ750 sidecars. Is it possible that this is an R75 but badged with an R60 plate? Is there a difference in the outward appearance of these two different engines? Is it possible to mount an R60 badge on an R75 engine (e.g., are there any holes that are supposed to line up, etc?) Here are a few pics of the left side (sorry, I don't have any right side pics of the engine) Thanks for any help you can provide.