Hiro Koiso Racing Clocks 214.224 Mph In Bonneville On 2006 Harley-Davidson Dyna

The 9th annual BUB Motorcycle Speed Trials, This year was the 5th year of Land Speed Racing at Bonneville for Hiro Koiso Racing. The bike had gone through every inch of renovation from the previous year.  This includes custom made fairings, a new JIMS135″ Twin Cam engine modified by T-Man Performance and a B-1 ProCharger that feeds air through custom intercooler. All this resulted in 262 horsepower at the rear wheel.

Despite wet conditions of the salt from rain in previous days, the team clocked one-way top speed of 214.224mph on this rubber mounted DYNA. Unfortunately, minor mechanical trouble on return run set average record back to 192mph. During a later run, a fire started by a broken fuel fitting. Hiro walked away but the bike was heavily damaged.

The team still managed to set new FIM World record (under calculation at this time) and AMA National record 192.391mph* (*both FIM and AMA records are subject of ratification at this point). These are the 12th and 13th Land Speed records for Hiro Koiso since 2008.

Hiro quoted “I’m proud of our team how far we came and very excited to glance at the potential the bike had. Even though we had to end the racing not the way we were expected, now we know what it takes to run 214 mph and what can be done to make it better in future. The bike can go fast not because of a rider or a builder, but team and family and supporters surrounding us. We are very fortunate and grateful for the great sponsors we have. We are definitely going back to the salt next year aiming for 220mph+ record(s).”

Zipper's

4 Responses to “Hiro Koiso Racing Clocks 214.224 Mph In Bonneville On 2006 Harley-Davidson Dyna”


  1. 1 ray c wheeler Sep 25th, 2012 at 2:34 pm

    Good job to one great team…and one helleva rider…..

  2. 2 Hater Sep 25th, 2012 at 5:51 pm

    Hiro is my hero.

    Not only does he show up every year with one of the best bikes at BUB, he does it with class and style.

    Congrats to Hiro, the team, and their families supporting them. You’d be hard pressed to find a harder working and nicer group of salt addicts.

  3. 3 Kerry Alter Sep 25th, 2012 at 6:58 pm

    Congrats to a great team!!!

  4. 4 dave silvia Sep 26th, 2012 at 8:56 am

    Congratulations Hiro and the race team from someone who knows what it takes and what the salt conditions hand out to everybody at any given minute- GREAT JOB TO ALL OF YOU”S !

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