Hmm looked around again, cuz that would rule out a couple different older bikes.
I ran into that in a discussion a while back & had a link when exploring the CTX, & was curious why it was called a motorcycle, vs. a scooter.
Per wikipedia The United States Department of Transportation defines a scooter as a motorcycle that has a platform for the operator's feet or has integrated footrests, and has a step-through architecture.[2]
So you'd still qualify. I suspect the definition probably changes a bit at some point, & are somewhat moot after the bike is imported since most states define any bike that can get out of it's own way as a motorcycle from what I can see.
So I guess my Helix is not a scooter. (It is kind of an odd bird)