Powered by a Rolls Royce Allison 250 series turboshaft engine, producing 238kW (320hp), this motorcycle has a recorded top speed of 227 mph (365 km/h), with a price tag of US$150,000 (US$185,000 in 2004). It is recognized by Guinness World Records as the "Most powerful production motorcycle" and the "Most expensive production motorcycle". Unlike some earlier jet-powered motorcycles, where a massive jet engine provided thrust to push the motorcycle, the turboshaft engine on this model drives the rear wheel via a two-speed gearbox. Riding the motorcycle is said to be somewhat tricky due to the inherent throttle lag in the engine, acceleration when letting off the throttle, and extreme length.