Barring some medical "things"... I would say yes.
I remember when snowmobles were newer... one of my close friends grandfathers [ a neighbor] asked for a ride. If I remember correctly he was 84 at the time. I think it took almost as long for him to get on and off the machine as it did the ride we did. He loved the chance to ride it.
I do realize it is easier to keep a snowmoble upright than a bike... and generally the snow is softer than pavement.... and all he had to do was sit there... and hang on....
but the excitement for him to do it was worth what risk there might have been.
glenn