Just noticed an ad for what is called the new J. A. Prestwich motorcycle with a new engine built to look like an original. The new Brough Superior, as mentioned recently, will debut at Pebble Beach with new JAP V-Twin engines built by Cameron Racing Engines. The bike shown here, according to the website, is the new JAP motorcycle, the first JAP bike produced in 101 years. I guess that means they plan to produce them for sale, though that is not clear.
The engine has electronic ignition, ceramic coated barrels, puts out 95 bhp and can be manufactured to order.
The new bike is interesting, but I think a vintage looking but new engine could find a lot of use in re-creations of some very old motorcycles and especially Morgan 3 wheelers or new look alike trikes like the Ace Cycle Car.
Link: J A Prestwich Industries