The list of three-wheeled vehicles available in the United States is a small but interesting one, with standout curiosities from the likes of Morgan and Ural immediately springing to mind. Of those various part-motorcycle-part-car machines, only a handful allow the occupants to lean in turns, with the Piaggio MP3 standing alone as the most recognizable example.
Patent drawings have revealed that Harley-Davidson, the quintessential American Motor Company, has been working on leaning three-wheelers for the last few years. This is a concept that has already proven itself viable with products like the Piaggio MP3 series of scooters currently on the market. HD has already established itself as a player in the V-Twin trike market with its first-ever factory trike, the Tri Glide Ultra Classic. That model, new for 2009, uses the more common arrangement of two
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