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Kawasaki H2R reaches 400km/h

Four-time World Supersport champion Kenan Sofuoglu has reached 400km/h (249mph) on the Kawasaki H2R, the track-only version of the supercharged sportsbike.

The Turk reached the speed in just 26 seconds on the closed Osman Gazi suspension bridge, about 50km southeast of Istanbul.

“When I asked for the motorcycle, Kawasaki said its maximum speed was 380km/h and that their dream was to reach 400km/h,” Kenan says.

“The first time I rode it, I felt its huge power and speed, and I made small changes to the motorcycle – keeping its original settings – and did not modify it.

“I reached 390km/h in my last trials and today I beat this and reached 400 km/h.”

Kenan normally reaches top speeds in a WSS race of around 300km/h, so it was all new for the most prolific WSS racer of modern times.

2016 Kawasaki Ninja H2R supercharged
Supercharged Kawasaki Ninja H2R

The recently completed 2682m suspension bridge is the fourth longest in the world. It sits 234m above the Sea of Marmara in the Gulf of İzmit and Kenan had to wait for low-wind conditions to achieve his mark.

After several trial runs, he achieved his run in the still of the early morning.

Kenan wore a specially prepared leather suit with extra protection and to avoid a tyre blowout, the speed had to be reached in less than 30 seconds.

The supercharged Kawasaki Ninja H2 costs $33,000 in Australia while the track-only H2R is $60,000. H2R

The street-legal Kawasaki Ninja H2 has 147.2kW (200ps/197hp) of power at 11,000rpm and 133.5Nm of torque at 10,5000rpm, but the supercharger boosts that to 154.5kW (210ps/207hp) and 140.4Nm.

The powerful track-only Ninja H2R has 228kW (310ps/305hp) at 14,000rpm and 165Nm of torque at 12,500rpm. With maximum ram air, power literally blows out to 240kW (326ps/321hp).

    1. The article notes :
      “to avoid a tire blowout, the speed had to be reached in less than 30 seconds”

      So forget about being able to sustain heat dissipation indefinitely.
      The manufacturers calculated that in 31 seconds you will have no more tires 🙂

  1. Now that the H2R has set a record or two, it’s probably worth thinking about some of the the engineering behind it.

    If that bike was making about 240kW (presumably at the crank), that is a lot of heat to get rid of, but not all the heat made makes the crank turn. Only about 1/3rd of the heat made creates the mechanical power we want.
    If we are generous and say that 40% of the heat made creates H2R crank power, that means the H2R is shedding (240 X 1/0.4)kW, or 600kW of heat out the exhaust and radiators and off the power unit surfaces.
    A typical little fan heater at home makes about 2.4kW of heat at full blast. The H2R would be making total of about 600/2.4 or 250 fan heaters worth of heat. Imagine what that would do to your electricity bill.
    Assuming half of the heat is going out the exhaust pipe, that leaves the cooling systems to deal with about 125 fan heaters or 300kW worth of heat.
    That is a lot of heat for a compact cooling system to deal with. Imagine the size of the radiator a 240kW car would have.

    I have to wonder whether the H2R cooling systems are capable of sustaining full power indefinitely. I guess we would have to set up a dyno inside a potent wind tunnel to really test it, not that there are many places you could actually ride one at full blast for long anyway.

  2. Is there documented proof that it reached 400kmh? Reading the speedo on the bike is not proof that it reached that speed.
    I know they reached 400 at Boneville in 2016 with modified fairings and gearing.

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