The RE5 was one of the few bikes powered by a Wankel rotary engine. I snapped this one at the Stafford show last October. The bike is dominated by the massive lump of the engine. The rotary motor is simple in concept but complex in practice. The instruments are housed in a cylindrical unit with a cover that opens with the ignition key. The exhaust system has some unusual cooling features. A finned casting on the engine and intakes that funnel air into a twin skinned exhaust.
The bike was only on sale from 1974-76 and wasn't a success because it didn't offer any advantages over the 750cc bikes it was up against.