Norton Commander Rotary (1991) vs Kawasaki ER4n (2011-12)
Comparison technical specifications
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| Make: | Norton | Kawasaki |
| Model: | Commander Rotary | ER4n |
| Years: | 1991 | 2011-12 |
| Engine: | Twin chamber rotary | Four stroke, parallel twin cylinder. DOHC, 4 valves per cylinder. |
| Capacity: | 588 cc / 35.9 cu in | 399 cc / 24.3 cu-in |
| Compression Ratio: | 9.0:1 | 11.0:1 |
| Cooling System: | Liquid cooled | Liquid cooled |
| Induction: | 2 x Ø38mm CV SUH14 carburetors | Fuel injection: ø34 mm x 2 Keihin |
| Starting: | Electric | Electric |
| Max Power: | 63.4 kW / 85 hp @ 9000 rpm | 42 hp / 32 kW @ 9500rpm |
| Max Torque: | 75.3 Nm / 7.7 kgf-m / 55.6 lb-ft @ 7000 rpm | 37 Nm / 27 lb-ft @ 7500 rpm |
| Transmission: | 5 Speed | 6 Speed |
| Front Suspension: | Ø38 mm Telescopic forks | 41 mm telescopic fork |
| Rear Suspension: | Twin Koni with preload adjust | Offset laydown single-shock with adjustable preload |
| Front Brakes: | 2 x Ø265 mm discs | 2x 300mm discs 2 piston calipers |
| Rear Brakes: | Single Ø265 mm disc | Single 220mm disc |
| Front Tyre: | 100/90 V18 | 120/70ZR17 |
| Rear Tyre: | 110/90 V18 | 160/60ZR17 |
| Fuel Capacity: | 23 L / 6.1 US gal | 15 Litres / 3.9 USgal |