Thanks for the correction. I knew HD used a 45° V I just slipped. Aprilla uses a 70°. My Ducati is also a single throw crank, but the rods are side by side, not the HD “knife and fork” setup.
Well I just learned something today. I didn’t think you were correct with the single pin Ducati crank... but you were. So I looked at a picture of a Honda RC51 crank. I actually have one of those bikes. Never knew it had a single pin crank as well. Weird how smooth Ducatis and RC51s sound when they fire at 270 and 450 degree intervals.