Here's something a bit different from the Motor Company, it's a patent application from Harley Davidson for a leaning trike. It's looks like a cross between the Can-Am Spyder and the Brudeli 625 but it is distinctively Harley with the big twin power plant in there. Whether they are thinking of producing this or something similar, they probably wanted to get the paperwork in to make sure they were covered. Filed on either September 27, 2006 or April 5, 2007, I can't figure out which dates apply, reading patent paperwork can be a bit confusing.
From the application:
The present invention relates to a suspension system for a three-wheeled vehicle. The suspension system permits the vehicle to lean while cornering, much like a motorcycle. This is accomplished via hydraulic actuators that force the bike into a leaning position while turning, and back to an upright position while tracking a straight line. A transverse beam is coupled to the hydraulic actuators and to spring dampers to allow the suspension to operate independently, even while the vehicle is cornering.
More drawings and links below: