bob maddox's harley davidson twin engine pulsejet motorcycle is up for sale

Jun 10, 2023

Youtuber Bob Maddox, known for building the largest pulsejet engines in the world, is also the designer of the Harley Davidson Twin Pulsejet motorcycle. Based on a 1929 Harley-Davidson track racer design, the bright red two-wheeler sports a custom tubular frame and is powered by two enormous stainless steel pulsejet engines that produce 250 pounds of thrust. Those in the mood for a spin had the opportunity to bid on this one-of-a-kind motorcycle at auction house Mecum for an estimated price of $25,000 to $35,000.

Bob Maddox’s motorcycle is based on the 1929 Harley-Davidson track racer design | all images by Mecum Auctions

Bob Maddox has been designing impressive pulsejet engines for years, selling them either as kits or as digital plans. His collection of vehicles includes motorcycles, skateboards, tricycles, go-karts, hot rods and more. In recent years, Maddox has become an internet sensation thanks to his YouTube channel, where he showcases his remarkable designs, driving them at breathtaking speeds.

In a video from 2011, the Youtuber unveils the custom Harley Davidson Twin Pulsejet motorcycle, which he says he has been working on for about 8 to 9 years. As seen in the video, two giant pulsejets take over the shiny red body, which is completed with a set of thin tires, heat shields, low-hanging bars and an angular fuel tank. The motorcycle can run on regular gasoline with an octane rating of 87 and is said to be capable of sprinting from 0 to 60 mph in 5.0 seconds. After a brief introduction to the unique two-wheeler, Maddox rides it and the flames blaze as the bright red motorcycle glides across the asphalt.

More than 10 years after it was built, the impressive Harley Davidson-inspired motorcycle turned up at Mecum (find more here) as a special feature in a January 2023 auction. It seems like the auction ended on January 15, and although the estimated starting price was $25,000, the two-wheeler reportedly sold for a lower price of $15,400.