I have a 2023 Super 3, and it has almost 700 miles on it now. The BB definitely made a loud whine when it was new but it seems to be quieting down as miles are added on (either that or my new helmet filters out the frequency). I wonder why Morgan went this route, they could have just used the drive shaft setup from BMWs motorcycles. I know there is extra weight with that but it would have been much quieter....
Pete Larsen used a Honda drive shaft for his M3W predecessor but because of the angle from centreline to drive sprocket wheel-side means the passenger seat is cramped. No easy answer to go from the driveshaft to the wheel drive. The original 3 wheeler put the gearbox where the bevel box is and the output was offset enough to clear the skinny rear wheel they used then.
The only solution for Pete Larsen was (with his Ace) to put the engine behind the seats, altering the aesthetics completely. Meanwhile we are stuck with bevel boxes which bizarrely sound worse than diffs from the 1950s…
