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VFR750F : ウィキペディア英語版
Honda VFR750F


The Honda VFR750F is motorcycle produced by Honda from 1986 to 1997. Originally intended as a sports bike to compete with the Suzuki GSX-R750 and Yamaha FZ750 it was reassigned to a sports tourer with its replacement in racing of the Honda VFR750R followed by the introduction of the more rounded 1990 VFR750FL. The fully faired motorcycle was introduced with a 104 horsepower (77 kW) liquid-cooled double overhead cam (DOHC) V4 four-stroke engine. All generations of VFR750F since 1990 had an ELF-designed pro-arm single-sided rear swingarm and since 1986 had durable, gear-driven cams.〔Cycle June 1986 http://www.mediafire.com/file/zjzwfi0zjg1/Cycle_Comp.pdf〕
The original VFR750F was first introduced to journalists after the 1985 Bol d'Or, and launched at Jerez, Spain. Introduced for 1986 as a complete redesign of the VF700/750F models in order to address some of the camshaft and bearing problems that had become associated with the first-generation Honda V4 engines, and to improve Honda's negative image concerning this engine. Compared to the VF750F, the new VFR750F had greater power output (104 hp up from 83 hp), lighter weight (claimed 20 kg), a lower center of gravity, a wider front tire, a slightly shorter wheelbase (15mm) gear driven cams and six rather than five gears.
"Tariff beater" 700 cc versions (VFR700F) of the first-generation bike were available alongside 750 cc versions in the US market, due to the tax laws in place at the time that penalized large-displacement imported motorcycles (in order to protect the troubled Harley Davidson Motor Company).
In the Japanese domestic market there were other VFR750F variants:
*VFR750P - A police-specification model with its own distinctive model number (RC35) was restricted to 77 ps (75 hp) and fitted with a five-speed gearbox, modified main stand, gear indicator, uprated alternator, crash bars, higher handlebars, and modified speedometer. This bike was not offered for sale to the general public.
*VFR750K - Not to be confused with the VFR750FK, this bikini faired training version of the VFR750F, again with its own distinctive model number (RC37), was restricted to 77 ps (75 hp). The oil cooler was removed and it was fitted with a modified main stand and gear indicator. This bike was offered for sale to the general public.
==Race history==

Although not designed as a race bike, in 1986 British racer Ron Haslam took a standard VFR750F to third place in a soaked Transatlantic Challenge race at Donington Park, UK.
A very special VFR750F called the '6X', a 135 hp@13000RPM / 188 mph full HRC prototype using RVF cycle parts and containing titanium valves, magnesium cases and flat-slide carburetors, weighing 165 kg (dry), even less than the factory RVF, was first seen ridden by Wayne Gardner at a Suzuka test against TT F1 machinery. Wayne trounced the opposition, smashing his four-stroke lap record by 1.5s. 6 Examples of the '6X' were built, 4 for the Domestic Championships and 2 for the American Championships.
The VFR '6X' was raced at the Isle of Man TT by Geoff Johnson, coming in 2nd to Joey Dunlop in both the F1 and Senior TT.
In the United States Fred Merkel and Wayne Rainey contested the 1986 AMA Camel Pro Championship, which at the time had both Superbike and F1 races but only one championship, with the best finish of the day counting. Merkel just rode in the Superbike while Rainey did the F1 as well. Merkel won two races and Rainey seven, but the championship was won by Flyin' Fred Merkel by only two points.
For 1987 Fred's bike was passed to Bubba Shobert who took 3rd place in 1987, being beaten by Wayne Rainey and Kevin Schwantz. The points he earned during the 1987 season gained him victory in the AMA Grand National. In 1988 Shobert won three of the seven races to win the AMA superbike championship.
The engine developed in the 6X became the basis for the factory racer, the VFR750R.
An engine race kit was available for the 1986 VFR from HRC for $4,000 (USD), including a titanium exhaust.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Honda VFR750F」の詳細全文を読む



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