It was an AV7, so a tapered shaft w/o woodruff key. However, the Variator on a Moby is on the motor side, unlike the Vespa Boxer. Mobies are quite unilke Pooks. The engine swivels on a rotating top mount against a sprung bottom mount, providing belt tension for the CVT. I would have to engineer the whole thing... which could be fun! The variator was sold with the engine, but I can get another.
I rebuilt my variator myself, loosely following the procedure you mentioned and linked (thank you), about a year ago. (I have the same username on MA.) The bike was previously unvariated, so I pieced it together from junkyard motors and mail-orders. I was building it up with a Malossi 62cc kit and a Ninja G3 pipe, revised gearing, and a CDI when I realized electric would be way more fun.
I agree with you, CVTs are great on gas mopeds. My previous Peugeots were both variated and a joy to ride.
I think Karen is still running the CVT on her Boxer ... I have to look further into this.
I'm really on the fence about adapting the Moby Variator for the electric drive. They're quite heavy and so would add a considerable amount of rotating mass to the drivetrain. I like your idea about a taper adapter - I do have a spare bottom end + crank I could try to mill down. But will it all be worth it?
I do have a lathe and a milling head, drill press, etc. available to me ... but am a bit of a noob in terms of their use!
Here are a few shots of the old powerplant:
and the spare bottom end:
Your thoughts / experience / opinions appreciated!