Positioned in Norton's classic motorcycle lineup, the 1973 Norton 750 Roadster MkV relies on a 745 cc (45.5 cu in) air-cooled twin, four-stroke powerplant. In factory specification, peak output is rated at 58 HP (42.3 kW) at 6,000 rpm while maximum torque reaches 63.7 Nm (47 lb-ft), transferring power to the rear wheel through a 4-speed gearbox and chain final drive. With a specific output of 77.9 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the 750 Roadster MkV measures 180.5 kg (398 lbs) dry, translating to a power-to-weight ratio of 0.32 HP/kg (3.11 kg per horsepower).
Specific Output
77.9 HP/L
Power-to-Weight
0.32 HP/kg (3.11 kg/HP)
Engine
Displacement745.0 ccm (45.46 cubic inches)
Engine TypeTwin, four-stroke
Engine Details360 degree parallel twin, air cooled.
Power58.0 HP (42.3 kW)) @ 6000 RPM
Torque63.7 Nm (6.5 kgf-m or 47.0 ft.lbs)
Compression8.9:1
Bore x Stroke73.0 x 89.0 mm (2.9 x 3.5 inches)
Valves/Cylinder2
Fuel SystemCarburettor. Twin Amal 32mm Concentric Mk1 carburettors
IgnitionStd points/coils. Fitted with Power Arc electronic system
LubricationDry sump high scavenging pump, separate oil tank
CoolingAir
Max RPM7500
Transmission
Gearbox4-speed
Final DriveChain (final drive)
ClutchLaycock de Normanville diaphragm clutch, dry
Performance
Top Speed186.7 km/h (116.0 mph)
0-400m12.80 seconds
0-100 km/h5.00 seconds
Fuel Consumption3.62 litres/100 km (27.6 km/l or 64.98 mpg)
Greenhouse Gases84.0 CO2 g/km. (CO2 - Carbon dioxide emission)
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
