DR650 adapter is 29.5mm total length, this is the adapter I used on my 1992 DR650.
My original design was 37mm total length and this proved to be too long, however I am leaving it in here because it may work for some application.
Print in PC or ASA/ABS, 100% infill, no supports needed.
DR650_adapter.par | 664.5KB | |
DR650_adapter.stl | 313.9KB | |
FCR39_MX_adapter37mm.par | 667.0KB | |
FCR39_MX_adapter37mm.stl | 318.3KB |