This radial engine motorcycle was built by Jesse James at West Coast Choppers. For those who don’t know, radial engines were used in the past to power aircraft. The engine, 7 cylinder – 110 hp, was manufactured by Rotec Engineering in Australia and was purchased by the owner of the bike, Russell Ballentine from Kansas, who had the crazy idea of building bikes with aircraft engines (he even owns the patent). Ballentine asked mechanic Mike Redpath to modify the engine, bought more parts, and then brought it to Jesse James to build a prototype. The finished bike was painted in green but I also found photos before the paint job. Also watch the video from Jay Leno’s Garage.