When comparing the engines, the Yamaha FZ1 has a 998 cc four-cylinder engine, and the FZ6 comes with a 600 cc, 4-cylinder, 16 valve engine. The FZ1 has 20 valves, and the FZ6 has 16 valves. When talking of horsepower, the Yamaha FZ1 comes with 141 at 9,500 rpm, and the Yamaha FZ6 comes with 98 at 12,000 rpm.