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The Honda CBR900RR, also known as the Fireblade in some countries, is a large displacement sport bike introduced in 1992 by Honda. It was the first of a series of large-displacement Honda models to carry the RR suffix. The development of the first generation CBR900RR was led by Tadao Baba.
The first generation RR, the CBR900RR, was introduced in 1992 with an 893 cc (54.5 cu in) inline-four engine set a precedent for light weight in the super bike class. The CBR900RR was based on an advanced research stage model known within Honda as the "CBR750RR". With the objective of equaling the acceleration of competitors’ flagship sport bikes, Honda increased the stroke of its inline 4-cylinder 750cc engine and raised displacement to 893cc. Complementing this excellent power performance were the bike’s dry weight of 185 kg, wheelbase of 1,405 mm and body almost identical to that of the advanced research stage model. At 453 lb (205 kg) wet weight, was heavier than Honda's own CBR600F2, by just 4 lb (2 kg) and the next-lightest open-class machine the Yamaha FZR1000 was heavier by 76 lb (34 kg)
Numerous changes were made to the second-generation RR, which debuted in 1994, including changes to damping rates and spring. The front fork was upgraded with a compression adjuster. Gearchange was improved with a new shift drum to improve notchy changes, the upper cowl stay went from steel to aluminum, and the cylinder head cover went from aluminum to magnesium. The styling of the bike also became more aggressive: The independent dual lights became irregular-shaped multi-reflector lights known as "fox eyes" and the bike had fewer of the RR's unique fairing holes. The foot pegs were firmer and slimmer like that of the RC45 and the reversed pedal on the original was replaced with a shift linkage. Instead of measuring speed from the front wheel the speed is measured from the countershaft sprocket with an electronic speedometer.
1996 brought the first major changes to what was now the third generation of the CBR900RR. In order to achieve a more optimized balance of rigidity, Honda significantly revised the 1996 models suspension and chassis. larger thinner-walled extrusions for more torsional rigidity were used in the swingarm and frame. Revised shock and fork internals and 5 mm (0.2 in) raised swingarm pivot. The bars were taller by 10 mm (0.4 in)and pulled back five degrees for better ergonomics. A 10 mm (0.4 in) increase in bore raised displacement to 918 cc (56.0 cu in). Other revisions were a smaller alternator a throttle position sensor added and as well as extra clutch plates a larger exhaust. The only changes for the 1997 model were graphics and color options.
In 1998, Honda continued subtle refinements in the fourth generation CBR900RR's chassis. It got a stiffer frame more like the original. Offset on the triple clamp reduced by 5 mm (0.2 in). Brakes got larger rotors on the front and new calipers. Ergonomics was revised with raised footpegs. The engine got revised with 80 percent new internals in an effort to reduce friction and weight. Cylinders bore got an aluminum composites treatment and new pistons. It also got a larger radiator and a new exhaust header in stainless steel.
The fifth generation of RR, known as the CBR929RR in North America, was introduced in 2000 and had a completely new 929 cc (56.7 cu in) engine dimensions more oversquare with lighter internals. Also adding fuel injection with larger valves set at a more narrower angle. A new all-titanium exhaust equipped with HTEV. The swingarm is mounted to the engine with bracing under the engine. Larger front rotors 330 mm mounted to 17 inch wheels instead of the 16 inch mounted to a new inverted fork.
The sixth generation of the RR was introduced in 2002 (known as the CBR954RR in North America and Japan), cylinder bore was increased from 74mm to 75mm, increasing capacity to 954 cc (58.2 cu in). Larger fuel injectors and radiator, re-mapped electronic fuel injection, and a more powerful ECU were also added. The bodywork and fairings were reworked for a sleeker, more aerodynamic feel. The frame was strengthened and a more rigid swingarm added and the footpegs were raised to allow for greater lean angles. Front discs increased to 330 mm. Dry weight was reduced to 168 kg (370 lb)and the wet weight is 195 kg (430 lb). Power at the rear wheel is 130.8 hp (97.5 kW) and 67.2 lb·ft (91.1 N·m) of torque.
John McGuinness won the Macau Grand Prix in 2001.
The CBR900RR was replaced by an all new CBR1000RR in 2004.
All specifications are manufacturer claimed unless specified.
The photo 2003-Honda-CBR929RR-CBR954RR-34638-GP.jpg (2003 Honda CBR929RR/CBR954RR - Comments?) was uploaded by: Rors72@hotmail.com.
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