Kawasaki AR 50 (1981-96) vs Kawasaki ER-6n (2006) vs Kawasaki Z 900 (2020)
Comparison technical specifications
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| Make: | Kawasaki | Kawasaki | Kawasaki |
| Model: | AR 50 | ER-6n | Z 900 |
| Years: | 1981-96 | 2006 | 2020 |
| Engine: | Two stroke, single cylinder, disc valve. | Four stroke, parallel twin, DOHC, 4 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valve per cylinder |
| Capacity: | 49 cc / 3.0 cu-in | 649 cc / 39.6 cu-in | 943 cc / 57.5 cu-in |
| Bore x Stroke: | 49 x 41.6 mm | 83 X 60mm | 73.4 x 56.0mm |
| Cooling System: | Air cooled | Liquid cooled, | Liquid cooled |
| Compression Ratio: | 7.8:1 | 11.3;1 | 11.8:1 |
| Induction: | Mikuni VM18SC Carburetor | 2x 38mm Electronic Fuel Injection Keihin | EFI with 36mm Keihin throttle bodies |
| Ignition: | Capacitor discharge | Digital TCBI | TCBI with electronic advance |
| Starting: | Kick | Electric | Electric |
| Max Power: | 10.2 hp / 7.5 kW @ 8500 rpm | 53 kW / 72.1 hp @ 8500 rpm | |
| Max Torque: | 8.53 Nm @ 8000 rpm | 66 Nm / 6.7 m-kg @ 7000 rpm | 99.1 Nm / 73.1 lb-ft @ 7700 rpm |
| Transmission: | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Chain | Sealed chain |
| Frame: | Steel single-cradle | Diamond, high-tensile steel | High-tensile steel trellis |
| Front Suspension: | Telescopic fork | 41 mm telescopic fork, | 41mm inverted fork with rebound damping and spring preload adjustability |
| Rear Suspension: | Swingarm with monoshock | Offset laydown single-shock with adjustable preload, | Linkage-assisted, rebound-damping and spring-preload adjustable horizontally mounted shock |
| Front Brakes: | Single 232mm disc | 2x 300mm discs 2 piston calipers | 2x semi-floating 300 mm discs 4 piston calipers |
| Rear Brakes: | 130 drum | Single 220mm disc 1 piston caliper | Single 250mm disc 1 piston caliper |
| Front Tyre: | 2.50–18 | 120/70ZR17 | 120/70 ZR17 |
| Rear Tyre: | 2.75–18 | 160/60ZR17 | 180/55ZR17 |
| Wheelbase: | 1205 mm / 47.4 in | 1405 mm / 55.3 in | 1455.4 mm / 57.3 in |
| Ground Clearance: | 175 mm / 6.8 in | 130 mm / 5.1 in | 145 mm / 5.7 in |
| Fuel Capacity: | 9.8 Litres / 2.1 US gal | 15.5 Litres / 4.1 US gal | 17 Litres / 4.5 US gal |