This is from the site Bring a Trailer (https://bringatrailer.com/) ...
This 1976 Hercules W-2000 (serial 480005185) is one of 1,800 built in Germany between 1974 and ’77. One of only a handful of production Wankel rotary engine-powered motorcycle designs, this one is said to be all-original with 8,550 miles from new, and it looks quite well-preserved in photos. The seller adds that it starts very easily, and runs and rides like new. Find it here on eBay in Chicago, Illinois with reserve not met. Special thanks to BaT reader Kyle K. for this submission.
The ad notes that “all-original” claims extend to the paint, seat, and its pan, and all are claimed to be in very nice condition. A large gallery of high-resolution, well-lit and composed photos show this to be true, with the bike displaying just enough patina to let you know it hasn’t been restored. These rare machines pop up for sale from time-to-time, but it’s safe to say this one’s probably one of the best left outside of a museum.
Says the seller: “When I purchased this particular machine, it was in the condition you see in the photos, but it did not run. I went through the entire machine and got everything working. All of the major engine, transmission, and braking components are operational. The tires are very nice and are the correct type and size. The brakes have also been completely rebuilt, front and rear. The engine and transmission are original and are in perfect running condition.”
As can be clearly seen below, Sachs designed and built these bikes’ 294cc, single-rotor Wankel. Output was about 30 HP at 6,500 RPM, and all but the last 199 built required pre-mixed fuel. According to a quoted fact snipped posted in the full ad, these bikes run dry crankcases (so to speak–shaft housing may be a more accurate description), in contrast to the rotary-engined Suzuki RE-5. It also notes that mixed oil is not of two-stroke type. Still, it remains unclear whether this machine is an “Automix” model.
Power is routed through a 6-speed, and the full ad contains many interesting images scanned from contemporary and modern magazine articles covering both this bike and Suzuki’s Wankel two-wheeler. Criticized when new as expensive and slow with inadequate ground clearance, the passage of time has lessened the impact of its shortcomings, and enhanced its finer qualities like good build quality, simple, handsome styling, and gem-like engine.