Velocette Viper Scrambler

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Velocette-viper-scrambler-01.jpg
Velocette Viper Scrambler
Manufacturer
Production 1958 - 68
Engine
Four stroke, single cylinder
Compression ratio 9.3:1
Ignition BTH racing magneto
Spark Plug KLG FE100 / Champion N3 / NGK B8ES, Lodge 3HLN
Battery 6V
Transmission 4 Speed constant mesh, close ratio, foot controlled
Suspension Front: Telescopic fork with hydraulic compression and rebound damping
Rear: Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable
Brakes Front: 7 x 1 in., drum
Rear: 7 x 1 in., drum
Front Tire 3.00 x 21 in
Rear Tire 4.00 x 19 in
Wheelbase 1365 mm / 53.75 in
Seat Height 838 mm / 33 in.
Weight 152 kg / 330 lbs (wet)
Fuel Capacity 11 L / 3 US gal
Manuals Service Manual



Engine[edit | edit source]

The engine was a Air cooled cooled Four stroke, single cylinder. The engine featured a 9.3:1 compression ratio.

Drive[edit | edit source]

Power was moderated via the Dry, three-plate.

Chassis[edit | edit source]

It came with a 3.00 x 21 in front tire and a 4.00 x 19 in rear tire. Stopping was achieved via 7 x 1 in., drum in the front and a 7 x 1 in., drum in the rear. The front suspension was a Telescopic fork with hydraulic compression and rebound damping while the rear was equipped with a Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable. The Viper Scrambler was fitted with a 11 L / 3 US gal fuel tank. The wheelbase was 1365 mm / 53.75 in long.

Photos[edit | edit source]

Velocette Viper Scrambler Velocette Viper Scrambler Velocette Viper Scrambler

Overview[edit | edit source]

Make Model Velocette Viper Scrambler
Year 1958 - 68
Engine Type Four stroke, single cylinder
Displacement 349 cc / 30.5 cub in
Bore X Stroke 72 x 86 mm
Compression 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 Tire 3.00 x 21 in
Rear Tire 4.00 x 19 in
Turning Radius 4.9 m / 16 ft.
Rake 27°
Wet Weight 152 kg / 330 lbs
Fuel Capacity 11 L / 3 US gal
Colours Black/chrome, Red/black, White/black