At the Texas Mile, October 2010, Bill Warner of Wild Bros Racing goes 278.6 mph (448.36 km/h) in a standing start mile, on a 650rwhp turbo charged Suzuki Hayabusa Streetbike. On-board video taken facing rearward using an AiM Sports SmartyCam with in-video display of GPS speed. (Sample rate of the in camera GPS does not allow recording of the top speed that was set in the timing traps.)
2011 Suzuki Hayabusa Specifications and Photos
via Wild Bros Racing