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The Honda CB900F is a Honda motorcycle made in two iterations which appeared some twenty years apart. Though both versions of the CB900F utilize straight four-cylinder four-stroke 900 cc (55 cu in) engines, the first version was a sport-adjacent UJM while the latter was a fuel injected naked bike derived from the SC33 CBR900RR.

The Honda CB900F is a Honda motorcycle made in two iterations which appeared some twenty years apart. Though both versions of the CB900F utilize straight four-cylinder four-stroke 900 cc (55 cu in) engines, the first version was a sport-adjacent UJM while the latter was a fuel injected naked bike derived from the SC33 CBR900RR. The first version was produced from 1979 through 1983, and was available in the United States in 1981 and 1982. In 1983 it was replaced by the CB1100F. The second version was available from 2002 through 2007. It is called the Hornet 900 in Europe and the 919 in North America, while the related CB600F is the Hornet 600 in Europe and the 599 in North America. In 2008 the second version CB900 was replaced by the CB1000R.

First version

Background In 1969 Honda introduced its flagship CB750 superbike, whose success led to Honda's domination of the motorcycle market. Honda had been successful in European endurance racing with their RCB-series RS1000, and had made advances in suspension technology from their experience in motocross, and the company chose to base a new DOHC roadster on their endurance racer. The CB900F's design was aimed at European markets, rather than the usual focus on the United States, where it was not available until 1981. In Europe, it was initially named Super Sport like the 750 (FZ and FA) later named after the Bol d'Or endurance race. In the market, the CB900F competed with larger capacity bikes like the Kawasaki Kz1000, Suzuki GS1000, and Yamaha XS1100.

Design The CB900F's engine has a 901 cc (55.0 cu in) four-cylinder DOHC engine with a bore and stroke of 64.5 by 69.0 mm (2.54 by 2.72 in). The engine drew on other designs, such as the CB1000C, CB1100F/CB1100R, and the inline-6 CBX1000. The CB900F has a five-speed gearbox and chain final drive, and it produces 71 kW (95 bhp) at 9,000 rpm The CB900F has two front disc brakes and one rear disk brake, all fitted with dual-piston calipers after 1983. The air-assisted fork was fitted with the Honda TRAC (torque reactive anti-dive control) anti-dive system in 1982 or 1983. The bike shares the same bodywork (tank, side covers, tailpiece) as the earlier CB750F Super Sport. There are similarities between the CB900F bodywork and that of the CB1100F and CBX.

Performance In magazine tests, the CB900F typically clocked low to mid 12 seconds in the quarter mile (and a low 11.84 seconds in a Motorcyclist magazine test). The engine was tuned to produce mid range power rather than maximizing peak horsepower, thus giving good acceleration from 4,000 rpm to the 9,500 rpm redline. At 140 km/h (90 mph) there was some vibration, but the relaxed riding position was comfortable at most speeds, but at the 210 km/h (130 mph) maximum speed wind pressure could cause rider discomfort. The CB900F was succeeded in 1983 by the CB1100F, and in 1987 Honda introduced the CBR1000F water-cooled inline fours.