This is the last B.M. I owned, '56 R50. and the nearest I got to road racing, Gordon Doble at Oran park mid '60s.
I did not even try one lap, (thought I might like it against better judgment)!
Cost bulk money, no acceleration but achieved 8000 rpm down conrod with the high R60 final drive ratio Terry Lauer at the helm.
Cheers pancho.