Honda Gold Wing Powered GRX
When the corporate designers go to work on a motorcycle powered car you get a concept like this, the GRX, utilizing the 1500cc flat six originally used in the Gold Wing. This has been around for a while though Honda doesn't seem inclined to actually produce it. Nice looking concept, though.
Suzuki GSX-R/4
Here's one that Suzuki put together for the show circuit a couple of years ago, powered by the superb Hayabusa engine. It's 1400 pounds of sheer fun, at least it could be but it never went beyond the concept stage. It sits on 20 inch wheels and had all sorts of neat electronic wizardry. They could probably sell a ton of these if they ever produced them and breathless rumors to that effect continue to surface. We'll see, but don't count on it.
Aprilia Magnet
Another nice concept, this one from Aprilia. Power is from a 550cc version of their supermotard engine along with electric motors in the wheels, this is actually a hybrid because the V-twin can be shut off for total electric running.
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