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1980 Honda XR 500A. Introduced in 1979, the twin-shock Honda XR 500 was the first "XR" model. The engine was a four-stroke, four-valve OHC, 497 cc (30.3 cu in) "Pentroof" engine. The bike had a conventional 18" rear wheel but an unusual 23" front wheel which was supposed to be better for riding over potholes and ruts.
1987 Honda ATC50 (prototype) 1973–1974, 1978-1985 Honda ATC70; first mini ATV; 1970-1978 Honda ATC90 (was US90 from 1970 to 1973); 1979-1985 Honda ATC110; 1984-1987 Honda ATC125M
In 1984, the bike was introduced with Honda's Radial Four Valve Combustion Chamber (RFVC). [citation needed] It has a 110 kg (240 lb) claimed dry weight, [1] and a 36-inch seat height (96–04). Honda claims the engine produces 28 horsepower at 8000 rpm and 17 ft-lb feet of torque. The 1996–2004 versions of the XR250R had 10.6 inches of ...
The Honda XR600R was an offroad dual-sport motorcycle powered by an air-cooled single cylinder, four-stroke engine, manufactured by Honda from 1985 to 2000, and is part of the Honda XR series. The currently available road oriented XR650L model is similar to the XR600R with an engine of more displacement but lower compression and less horsepower.
Honda abandoned the project and designed the NS500 two-stroke bike to compete in the 1982 season. [11] Spencer would ride the NS500 to Honda's first 500 cc world championship in 1983. Ultimately, what doomed the NR500 project was that Honda had tried to develop too many technologies at one time.
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The Honda CR250M had a two-stroke 29 horsepower engine, and weighed in at 229 pounds (104 kg). [2] [3] Designed by Soichiro Miyakoshi, the prototype production machine began testing in Japan in 1971, and on California motocross tracks in 1972. [4]
The Honda XBR 500 is a 500cc Japanese sports motorcycle launched by Honda in 1985 and in response to the Yamaha SR500. It is powered by a single-cylinder four-valve engine with the valve stem axes arranged radially relative to the geometric centre of the hemispherical combustion chamber - (Honda's Radial Four Valve Combustion Chamber, or RFVC ...