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.

Using the same bottom end as the Venom, the Viper had a lot of chrome plating and was offered in a choice of black or "willow green" paintwork.

[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.

[4] Built to the Viper Clubman standard, the Scrambler had a specially lightened frame and high level enduro style exhaust pipes.