First generation models are known as the FZ1 in the United States and FZS1000 Fazer in Europe. They have tubular steel frames and modified YZF-R1 engines which are carbureted. The models were virtually unchanged over this period, except for colour options, the introduction of the FZS1000S which had a black engine, and in some European countries the 2005 models were fitted with rudimentary catalytic converters.