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Velocette MSS

Make Model	Velocette MSS
Year	1935 - 68
Engine	Four stroke, single cylinder,
Capacity	499 cc / 30.5 cub in
Bore x Stroke	86 x 86 mm
Compression Ratio	6.75:1
Cooling System	Air cooled
Carburetor	Amal Monobloc
Lubrication	Dry sump
Exhaust	Single, megaphone silencer
Ignition	Magnetor, Lucas system
Starting	Kick start
Battery	6V, 60W
Max Power	19.9 kW / 27 hp @ 5000 rpm
Transmission	4 Speed
Final Drive	Chain
Gear Ratios	1st 14 / 2nd 9.6 / 3rd 7.3 / 4th 5.5:1
Dimensions	Length: 2130 mm / 84.0 in. Width: 700 mm / 27.5 in Height: 990 mm / 39.0 in
Wheelbase	1365 mm / 53.75 in
Ground Clearance	140 mm / 5.5 in
Seat Height	775 mm / 30.5 in
Front Suspension	Telescopic fork with 2-way hydraulic damping
Rear Suspension	Woodhead-Monroe springs with hydraulic damping, later Armstrong and Girling, adjustable
Front Brakes	Drum
Rear Brakes	Drum
Front Wheel	WM2 x 19
Rear Wheel	WM2 x 19
Front Tyre	3.25 x 19 in
Rear Tyre	3.25 x 19 in
Rake	27°
Fuel Capacity	19.3 L / 5.1 US gal
Dry Weight	170 kg / 375 lbs
Top Speed	130 km/h / 80 mph
Colours	Black/chrome, Red/black, White/Black
Source	Wikipedia, Motos-anglaisis

The Velocette MSS is a motorcycle made by Velocette. It was fast, reliable and economical but could not compete against a new range of British twin-cylinder motorcycles. Production ended in 1968.

It was launched in 1935 as a 500cc sports version. World War II halted production which did not resume until 1954. The new MSS was a much more modern machine with the same frame as the Velocette MAC and was fitted with sidecar lugs and had optional panniers to appeal to the touring market. Buyers started tuning the MSS for speed, however, and the factory responded by producing the sports Velocette Venom model. In 1955 a scrambles version was also produced.

Racing history
Burt Munro from New Zealand, featured in the film The World's Fastest Indian raced a heavily modified 1936 Velocette MSS. Racing preparation included making special pistons, changing the frame and increasing engine capacity to 650 cc. His top speed record on this motorcycle was 138 mph (222 km/h) with a 1/4 mile time of 12.31 seconds.