Gavin Walker, owner of Harley-Davidson Victoria in Australia is a faithful reader who just informed me that his son Jack, only 20 years old, in an unofficial attempt, just smashed the longest distance jump ever made on a Harley. In February 1971, Evel Knievel set a new world record by jumping 19 cars on his Harley-Davidson XR-750. He held that record for 27 years until Bubba Blackwell jumped 20 cars in 1998, also on an XR- 750. Evel’s record distance was 151 feet (46m) and Bubba managed to jump 157 feet (47.8m).
But last weekend, in a dusty paddock at Mildura South, Australia Jack unofficially, but for all intents and purposes, broke the world record for the longest distance jumped on a Harley Davidson motorcycle, leaping more than 48 meters. A new official attempt will be done very soon to have this world record jump officialized. For those interested by the technical aspect, “Jumping Jack” uses a heavily modified XR 1200, leaves the up ramp at about 100 kph and 4000 rpm in 3rd gear. In the air he must adjust the position of the bike to compensate for any wind, and lands the 257 kg (about 570 ppunds) motorcycle rear wheel first and very fast after on the 1st wheel with the front end taking a huge pounding. The suspension technology uses nitrogen and a floating piston. The forks themselves contain no springs and consist of an inner and outer fork tube with fluid in the top of it and air inside the fork tube along with valving and the floating piston. With these custom forks the length allows for considerable travel which is necessary when landing. For the official record Jack wants to go well beyond his unofficial record! More very soon…Harley-Davidson Victoria.