The original Hayabusa’s 1299cc inline-four made 158 horsepower and a real-world-friendly 96 lb.-ft. of torque. In 2008 bore grew to 85mm, bringing the engine to 1340cc. With that change came more power: Right around 170 bhp and 104 lb.-ft. of torque. Sure, at 550 pounds wet, the ‘Busa is no lightweight sparrow, but sportbike-like steering geometry (24 degrees of rake, 3.8 in. of trail) help keep the GSX feeling lighter than it is.