Longest Jump Ever On A Harley-Davidson

walker1walker2Gavin 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.


11 Responses to “Longest Jump Ever On A Harley-Davidson”

  1. 1 Bob Walker Sep 24th, 2009 at 8:18 pm

    That is sooo cool!!! As a follow-up, I’d like to see him jump an exact replica of Evel’s XR750.

  2. 2 Brenda Fox Sep 24th, 2009 at 9:02 pm

    “Jack Down Under” got some jump!

  3. 3 WT Sep 25th, 2009 at 7:08 am

    Evel still did it better.

  4. 4 A 1 cycles Sep 25th, 2009 at 9:08 am

    its hard to compare modern technology forks to 35mm showas with 10 oz. of 7 weight oil in them? incredible jump though it takes huge balls…good on ya mate

  5. 5 Dylan Sep 25th, 2009 at 4:31 pm

    OK for the sceptics let’s through a few more equasions into the pot! Jacks only 20yrs old with no proffesional riding background ,Evils bike weighs around the 300pnd and the xr750 was designed as a compiton motorcycle, the xr1200 weighs 580pnd+ and was built as a road bike this thing in comparison is a monster!! if you have ever been Milwaukee museum you might see Evils jump bike and notice that it is far from stock! Jacks 1200 apart from the suspension mods is as it came from the crate! the past is the past remeber the grates but support the future or you will live in the past! GO JACK

  6. 6 Jack's Dad Sep 25th, 2009 at 4:36 pm

    Dear WT where and when did eveil get his first break ! , the kid is anti drug campainer and praised by the local police for his attitude in steering other young members of the community and rides a 590 pound stock xr with suspension modifications made in the back yard by a friend of the family, not one bought part,everything made in house, you cannot buy suspension that will land 1/4 of a ton of motorcycle.
    please follow his progress and you might be more enlightened and capable of writing something positive, the world needs it !!
    proud Dad

    Dear bob walker , this little bugger would jump anything , anywhere ,its his dad that would rather him expand new horizons.
    thanks for all the comments

    the weather here is no good for jumping but we will be back very soon!!

  7. 7 Doc Robinson Sep 25th, 2009 at 4:44 pm

    Way to go Jack! I’ve seen this suspension technology up close. Both in disassembled form and working in practice jumps with Crusty Demon Seth Enslow aboard. It looks like a true breakthrough in suspension technology to me. And by the way, never underestimate a bush mechanic, they’re the stock that blokes like Burt Munro and John Britten came from.

  8. 8 Manhattanchoppers Sep 27th, 2009 at 12:51 pm

    awsome.. mate

  9. 9 tattooeddmike Sep 27th, 2009 at 5:00 pm

    Congrats and Good Luck on the Next JUMP! Wish you the best and with Your winning Attitude and your Father behind you it sound like you’ll do well. Thanks Cyril for the positive post here and look forward to seeing this youngster making a new record!

  10. 10 Larry R. Sep 28th, 2009 at 11:06 am

    Can’t wait to see ya’ make the jump. Best of luck.
    Larry R.

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