Capt. Pork
I'm not real sure what your definition of a "full on motorcycle" is. This is a Harley-Davidson Super Glide. It is basically an enlarged version of a Sportster. They, the Sportster and the Super Glide, share the same forks but the Super Glide has the bigger 88 cubic inch engine (1450 cc vrs. 883 or 1200 cc) and it is rubber mounted to reduce felt vibration (as of 2004 the Sportsters get rubber mounted engines too). The frame is larger as is the tank and seat. Naturally the Super Glide is heavier also. The engine and transmission are separate parts on the larger scooters whereas the engine and transmission are fitted into the same case on the Sportsters.
The largest scooters made by Harley-Davidson of course are the touring models, they have a little longer wheel base, less than 2" longer than this one, and generally include saddle bags and some have fairings. The engine/transmission combo is the same as on mine with the addition of fuel injection being an option.
There may be a bit of misunderstanding here on the term "scooter". "Scooter" or "Scoot" is a term of endearment used by a lot of Harley riders for their motorcycles. "Bike" is used around these parts a lot too when speaking of motorcycles and I don't think they mistake that for bycicle.
I hope this answers your question
