1973 Motor Cycle World Norton 850 Commando Roadster Road Test
Download the complete PDF version using the green download button at the top right of this page for the October 1973 Motor Cycle World road test of the Norton 850 Commando Roadster. Published at the arrival of Norton’s larger-capacity 850 twin, this period magazine feature reviews the bike’s engine changes, road manners, braking, comfort, electrical equipment and overall touring character in the context of the early 1970s motorcycle market.
The article explains how Norton increased displacement from the earlier 750 by enlarging the bore to 77 mm while retaining the 89 mm stroke, giving the new Commando an 828cc engine. It praises the 850’s stronger torque, smooth power delivery, stable handling and improved long-distance suitability, while also discussing details such as the Isolastic frame system, revised lighting, larger tail lamp and hydraulic front disc brake.
The final specification panel records the road test figures and factory-style details, including 8.5:1 compression, twin 32 mm Amal carburetors, 430 lb dry weight, 3-gallon fuel capacity, a recorded quarter-mile time of 12.75 seconds at 105 mph and a tested top speed of approximately 125 mph. The feature is a valuable period review of one of the most important Commando developments.
Contents Include
- 1973 Motor Cycle World road test of the Norton 850 Commando Roadster
- Introduction to Norton’s larger 828cc Commando engine
- Bore, stroke and compression ratio details
- Comments on power delivery, torque and smoothness
- Handling, suspension and Isolastic frame impressions
- Front disc brake and rear drum brake evaluation
- Lighting, electrics and touring equipment observations
- Rider comfort and long-distance road test notes
- Period performance figures and measured specifications
- Quarter-mile, top-speed and dry-weight data
