You can also keep your eyes open for a handlebar to fit a K75, I think. They came in a couple different widths, but should fit the R65, if I recall correctly.
Wjen I went from the "USA" bars on my 1982 R65LS (which really didn't fit the bike well as they were like cruiser/chopper bars on what is essentially a cafe racer type style), I had to get shorter top brake line - there was no avoiding it.