Norton Mercury 650 (1968-70) vs Honda CBR 400RR (1993) vs KTM 300 EXC Enduro (1997-98) vs Norton Commando 961 Café Racer MKII (2016-17) vs Norton Atlas Nomad (2019)
Comparison technical specifications
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| Make: | Norton | Honda | KTM | Norton | Norton |
| Model: | Mercury 650 | CBR 400RR | 300 EXC Enduro | Commando 961 Café Racer MKII | Atlas Nomad |
| Years: | 1968-70 | 1993 | 1997-98 | 2016-17 | 2019 |
| Engine: | Four stroke, parallel twin | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder. | Two stroke, single cylinder | Four stroke, parallel twin with push-rod valve actuation, 3 bearing crank balancer shaft, 2 valves per cylinder | Four stroke, parallel twin. 270 degree firing order. Chain driven DOHC, with idler gear. |
| Bore x Stroke: | 68 x 89 mm | 55 x 42 mm | 72 x 73 mm | 88 x 79 mm | 82 x 61.5mm |
| Cooling System: | Air cooled | Liquid cooled; radiator with cooling fan | Liquid cooled | Air cooled | Liquid cooled |
| Induction: | Single concentric carburetor, Amal | 4x 26mm Flat-side CV | Keihin PWK38 D-slide carburetor | Fuel injected | Electronic fuel injection system. 4 fuel injectors. Full drive-by-wire system. |
| Starting: | Kick | Electric | Kick | Electric | Electric |
| Transmission: | 4-Speed | 6 Speed | 5 Speed | 5 Speed, constant mesh | |
| Final Drive: | Chain | Chain | Chain, Regina O-ring | Chain, 525 "O" ring | Chain |
| Frame: | Single downtube, cradle | Twin-spar, box-section aluminum | Steel, CrMo | Tubular steel with integral oil tank | Twin tube seamless steel perimeter chassis with aluminium swingarm mount. Swingarm, Braced twin spar cast aluminium. |
| Front Suspension: | Telescopic fork | 41mm Showa damper-rod forks with adjustable pre-load | Marzocchi 45 upside down fork and shock | Ø43 mm Öhlins USD, adjustable preload, compression, and rebound damping. | 50mm diameter Roadholder USD forks. Preload, compression and rebound adjustable |
| Rear Suspension: | Swingarm, plungers | Showa gas/oil shock with adjustable preload and compression | Fully adjustable Ohlins 3A mono-shock | Öhlins reservoir-style twin shocks, adjustable ride height, preload, compression, and rebound damping. | Roadholder monoshock with rising rate linkage and piggyback reservoir. Adjustable preload. |
| Front Brakes: | Drum, twin leading shoe | 2x 275mm discs 4 piston calipers | Single260 mm disc | Brembo 2 x Ø320 mm fully-floating high carbon stainless steel discs, 4 piston Brembo radially mounted calipers. Brembo front brake master cylinder with integral reservoir | 2 x 320mm full floating Brembo discs. Radially mounted twin Brembo monoblock callipers with ABS. Brembo master cylinder. |
| Rear Brakes: | Drum | Single 220mm disc 2 piston caliper | Single 220 mm disc | Brembo single Ø220 mm disc, 2 piston caliper. Brembo rear brake master cylinder | Single 245mm Brembo disc. Brembo twin piston rear calliper with ABS. Brembo master cylinder. |
| Dry Weight: | 185 kg / 408 lbs | 163 kg / 359.4 lbs | 112 kg / 247 lbs | 188 kg / 415 lbs | 178 kg / 392.4 lbs |