Here in the UK they were B100P and really popular, I remember Motorcycle Mechanics magazine recommending them to pretty well everyone who wrote in for buying advice, they were affectionately known as Bloops

Mine was blue, it was marked as a 120, not a 100, but it looks like pretty much exactly the same animal. Shit! We're old! That was 50 years ago. Does it have a 4 speed straight down gearbox, with Neutral at the top? That led to a bit of confusion, until I figured out what was going on, I can tell you. Now try a British 'classic' right-foot change, one up and then 3 or 4 down, with a heavy wooden clutch. Again, it all makes rather good sense, once you get used to it, but ~ Like a reverse pattern / 'race shift' on the left foot, it's not too bad if that's the only bike you ride, but if you ride that and then try to ride a 'normal' bike ~ you're in a world of trouble. I have not had the joy of trying to ride in the USA or any place they drive / ride on the right, but I'd guess that's the same only more-so. Something that's the habit of a lifetime, suddenly you've got to do the exact opposite, and if you forget for 3 seconds it can kill you, and quite possibly other people too.