The V-twin is basically one quarter of a radial engine, one of the best designs ever concocted.
Are you aware that during WW-II when the military needed reliable motorcycles for curriers, Harley was producing imitation BMW opposed and shaft driven bikes for four years, and then went straight back to building the same stupid garbage the day after the war ended? I mean, they tried running normal Harleys out in the desert in Arizona and after five minutes the real cylinder cooked itself (no air to rear cylinder with inline 45-V) and after ten minutes the sand tore the chain apart.