Okay, so what determines that these are classified as "motorcycles" as opposed to "automobiles?" Some of the other concepts presented have got to be better than a KIA Reo, even in a crash, so what makes the difference? Three wheels instead of four? So are aircooled (bug motors) VW trikes a car or a cycle?
Up here in liberated Washington it now takes a special endorsement to ride a trike if it is derived from a motorcycle chassis, but not from a car chassis. Go figure!
In UK we work on number of wheels for yearly road taxes and historically whether a working reverse shift was fitted or not.
Motorcycles (or as they say 'motor bicycles') always have 2 wheels as in the 'bi' and are lowest taxation class. Next comes motor tricycles with you guessed it - 3 wheels, then cars or automobiles with 4 or more wheels. Now why didn't they call cars quadrocycles? A one wheeled machine as seen at circuses would be called a monocycle, I've never seen a motorised one and don't think there's a taxation class!
Somewhere down the line the word 3 wheeler came in as normally representing an enclosed 3 wheel car/automobile - but I think the officials still call both VW 'trike' conversions and 3 wheel cars 'motor tricycles'. There's another old rule they used for taxation which was that nothing other than a 4 wheel classified vehicle would have a reverse shift but I think they did away with that. I remember 3 wheel 'cars' used to come with a plate fixed on the reverse shift position and owners used to take them off! Imagine pushing a 3 wheeler with 3 passengers in the rain to reverse it!
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