The Yamaha FZ1 features a liquid-cooled, 4-stroke, 20-valve DOHC inline-four engine, derived from the 2004 YZF-R1, but tuned for better midrange torque. It includes a 40% heavier flywheel and revised balance shaft, along with new camshafts for improved performance at lower revs. The engine produces 149.9 hp at 11,000 rpm and 106.8 Nm of torque at 8,000 rpm. The bike also employs Yamaha’s two-way fuel injectors with secondary throttle valves controlled by a 32-bit ECU. Additionally, it has a cast aluminum die-cast diamond-shaped frame, telescopic forks with split damping, and a fully-adjustable rear shock. The bike is equipped with dual 320mm front discs and a single 245mm rear disc brake, and optional ABS in some models.