This message is only to say that the motorcycle on the
movie Indiana Jones and the last crussde is a BMW R75 with
side car. This motorcycle was very popular in the nazi army
on 2WW.it was a 750cc motorcycle very strong and 95 km/h high speed

It is not much probable that they used a bike of the late 30s rather than a more recent one, especially seeing the action scenes in which it is used.
Well, I'll copy your comment to the page for reference/comments.