Norton Mercury 650 (1968-70) vs Norton Commando 750 Roadster (1970-71)
Comparison technical specifications
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| Make: | Norton | Norton |
| Model: | Mercury 650 | Commando 750 Roadster |
| Years: | 1968-70 | 1970-71 |
| Engine: | Four stroke, parallel twin | Four stroke, parallel twin cylinder, push rod 2 valves per cylinder. |
| Bore x Stroke: | 68 x 89 mm | 73 x 89 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 9.0:1 | 9.0:1 |
| Starting: | Kick | Kick |
| Max Power: | 35 kW / 47 hp | 58 hp / 43 kW @ 6800 rpm |
| Transmission: | 4-Speed | 4 Speed |
| Final Drive: | Chain | Chain |
| Front Suspension: | Telescopic fork | Telescopic forks |
| Rear Suspension: | Swingarm, plungers | Dual shocks |
| Front Brakes: | Drum, twin leading shoe | Single 203 mm drum |
| Rear Brakes: | Drum | Single 178 mm drum |
| Dry Weight: | 185 kg / 408 lbs | 195 kg / 430 lbs |