The VF and VFR series was a motorcycle

Motorcycle

A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

 made by Honda

Honda

is a Japanese public multinational corporation primarily known as a manufacturer of automobiles and motorcycles.Honda has been the world's largest motorcycle manufacturer since 1959, as well as the world's largest manufacturer of internal combustion engines measured by volume, producing more than...

 and had a V4 engine

V4 engine

A V4 engine is a V form engine with four cylinders and three main bearings.-Automobile use:Lancia produced several narrow-angle V4 engines from the 1920s through 1960s for cars like the Lambda, Augusta, Artena, Aprilia, Ardea, Appia, and Fulvia....

. The bike was also the first to utilize a Sprag

Sprag

A sprag clutch is a one-way freewheel clutch. It resembles a roller bearing, but instead of cylindrical rollers, non-revolving asymmetric figure-of-eight shaped sprags are used...

 (one-way) clutch

Clutch

A clutch is a mechanical device which provides for the transmission of power from one component to another...

.
The V-Four engine was prominent in Honda's model line-up in the early 1980s and had engine capacities ranging from 400 cc to 1,100 cc. The V-Four design had only been used a few times in the history of motorcycles, most notably by Matchless

Matchless

Matchless is one of the oldest marques of British motorcycles, manufactured in Plumstead, London, between 1899 and 1966. A wide range of models was produced under the Matchless name, ranging from small two-strokes to 750 cc four-stroke twins...

. The earliest Honda VF series engine was designated the V45 for its size (45 cubic inch) and was very narrow being only 16 inches (406 mm) wide.