Velocette Viper Scrambler (1958-68)

The Velocette Viper Scrambler was a motorcycle manufactured from 1958-68. It had a four-stroke single cylinder engine with a capacity of 349cc and a compression ratio of 9.3:1. The bike featured a dry sump lubrication system, an Amal TT monobloc carburetor, and a single, megaphone silencer exhaust. The ignition was powered by a BTH racing magneto and the bike was started with a kick start. The Viper Scrambler was capable of reaching a maximum power of 26 kW / 29 hp @ 7000 rpm. The bike had a dry, three-plate clutch and a 4-speed constant mesh, close ratio, foot-controlled transmission. The final drive was a chain. The bike had dimensions of 2260 mm in length, 890 mm in width, and 1090 mm in height. The Viper Scrambler had a wheelbase of 1365 mm, ground clearance of 165 mm, and a seat height of 838 mm. The suspension on the bike consisted of a telescopic fork with hydraulic compression and rebound damping in the front and Woodhead-Monroe springs with hydraulic damping in the back. The front and rear wheels were 7 x 1 inches in size with light alloy rims and spokes. The front and rear tires measured 3.00 x 21 inches and 4.00 x 19 inches respectively. The bike had a turning radius of 4.9 m and a rake of 27 degrees. Its wet weight was 152 kg and it had a fuel capacity of 11 L. The Velocette Viper Scrambler was available in black/chrome, red/black, and white/black colors.

Technical specifications:

Make Model: Velocette Viper Scrambler

Year: 1958 – 68

Engine: Four stroke, single cylinder
Capacity: 349 cc / 30.5 cub in
Bore x Stroke: 72 x 86 mm
Compression Ratio: 9.3:1
Cooling System: Air cooled
Lubrication: Dry sump
Carburetor: Amal TT Monobloc
Exhaust: Single, megaphone silencer
Spark Plug: KLG FE100 / Champion N3 / NGK B8ES, Lodge 3HLN
Battery: 6V
Ignition: BTH racing magneto
Starting: Kick start
Max Power: 26 kW / 29 hp @ 7000 rpm
Clutch: Dry, three-plate
Transmission: 4 Speed constant mesh, close ratio, foot controlled

Gear Ratios: 1st 17.9 / 2nd 12.46 / 3rd 9.5 / 4th 7.85:1
Final Drive: Chain
Dimensions: Length: 2260 mm / 89.0 in Width: 890 mm / 34.5 in Height: 1090 mm / 43.0 in.
Wheelbase: 1365 mm / 53.75 in
Ground Clearance: 165 mm / 6.5 in.
Seat Height: 838 mm / 33 in.
Front Suspension: Telescopic fork with hydraulic compression and rebound damping
Rear Suspension: Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable
Front Brakes: 7 x 1 in., drum
Rear Brakes: 7 x 1 in., drum
Wheels: Light alloy rims, spokes
Front Wheel: WM1 x 21
Rear Wheel: WM3 x 19
Front Tyre: 3.00 x 21 in
Rear Tyre: 4.00 x 19 in
Turning Radius: 4.9 m / 16 ft.
Rake: 27 degrees
Wet Weight: 152 kg / 330 lbs
Fuel Capacity: 11 L / 3 US gal
Colours: Black/chrome, Red/black, White/black

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