Velocette Viper

Velocette Viper
Manufacturer	Velocette
Production	1955-1968
Engine	349 cc, OHV air cooled single
Top speed	91 mph
Power	28 bhp @ 7,000 rpm
Brakes	drum brakes
Wheelbase	53.25 inches (135.3 cm)
Weight	364 pounds (165 kg) (dry);
Fuel capacity	3.5 gallons
Turning radius	16 feet (4.9 m)

The Velocette Viper is a British motorcycle made by Velocette between 1955 and 1968. Built using traditional methods and materials, it struggled to compete against more modern machines, so from 1960 the designers added new glass fibre enclosure panels, making the Viper one of the first enclosed production motorcycles.[1]

Development

Introduced in October 1955, the single-cylinder Viper was developed from the 500cc Velocette MSS which also led to the almost identical 500cc Venom. . Designed by Charles Udall, the Viper's 349cc engine had a bi-metal cylinder with a cast iron liner, high compression piston and a light alloy cylinder head. Using the same bottom end as its sister bike the 500cc Velocette Venom, the Viper had a lot of chrome plating and was offered in a choice of black or "willow green" paintwork. The Viper was also ahead of its time in being one of the first to have glass fibre enclosure panels from 1962. These panels proved unpopular with the traditional buyers of Velocette singles,[1] as they extended from the front of the engine, level with the top of the crankcase, to the rear pillion footrests.[2]

Viper Clubman

From 1960 Velocette produced the Viper in a "Clubman" racing version, fitted with TT Amal carburettors, a BTH racing magneto and a close ratio gearbox, with the compression ratio raised to 9.3 to 1.[1] The Clubman dispensed with the unpopular glass fibre enclosure and instead made a feature of its highly polished crankcase and gearbox castings. Supplied with "rearset" controls, lowered handlebars and a steering damper, the Clubman also had a range of optional accessories including a "megaphone" exhaust silencer, a rev counter and light alloy wheel rims.[2]

Viper Scrambler

In December 1958[3] the Velocette development team built 25 off-road Vipers, which were sent to the United States for evaluation in enduro events.[4] Built to the Viper Clubman standard, the Scrambler had a specially lightened frame and high level enduro style exhaust pipes.[2]

Viper Special

The Velocette Viper Special was introduced in November 1962 and featured a three gallon tank, pressed steel full width hub and the Velocette MSS rear hub as well as a '100 mph' speedometer in a modified headlamp nacelle.[3]

gollark: But OCRing things locally is hard.

gollark: Fear carcinization.

gollark: No it isn't. Monkeys get monkeypox. So obviously it is the opposite.

gollark: As always.

gollark: It's not very ultimate if they have a more ultimate version right beside it.

References

Currie, Bob (1980). Great British Motorcycles of the Fifties. Hamlyn Publishing Group Ltd. ISBN 978-0-86363-010-1.
Bacon, Roy (1988). British Motorcycles of the 60's. Osprey Publishing. ISBN 978-1-85648-166-3.
Gibbison, David. "Velocette Evolution". Retrieved 30 May 2009.
"Velocette Viper Scrambler". Retrieved 30 May 2009.

External links

Velocette Viper (Video)

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[Currie50s-1] Currie, Bob (1980). Great British Motorcycles of the Fifties. Hamlyn Publishing Group Ltd. ISBN 978-0-86363-010-1.

[Bacon60-2] Bacon, Roy (1988). British Motorcycles of the 60's. Osprey Publishing. ISBN 978-1-85648-166-3.

[Evolution-3] Gibbison, David. "Velocette Evolution". Retrieved 30 May 2009.

[scrambler-4] "Velocette Viper Scrambler". Retrieved 30 May 2009.