Kawasaki Z 900 50th Anniversary (2022) vs Cagiva Alazzurra 650GT (1985-91) vs Kawasaki ZX-6R (2008) vs Kawasaki KH 250 (1980-81)
Comparison technical specifications
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| Make: | Kawasaki | Cagiva | Kawasaki | Kawasaki |
| Model: | Z 900 50th Anniversary | Alazzurra 650GT | ZX-6R | KH 250 |
| Years: | 2022 | 1985-91 | 2008 | 1980-81 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Four stroke, 90°“L”twin cylinder, SOHC, desmodromic 2 valve per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder | Two stroke, transverse three cylinder, |
| Capacity: | 948 cc / 57.8 cu-in | 649 cc / 39.6 cu-in | 599 cc / 36.6 cub in | 249 cc / 15.2 cu-in |
| Bore x Stroke: | 73.4 x 56.0 mm | 82 x 62.5 mm | 67 x 42.5 mm | 45 х 52.3 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 11.8:1 | 10.0:1 | 13.9:1 | 7.5:1 |
| Induction: | Fuel injection: 36 mm x 4 with sub-throttle | 2x 36mm Dell'Orto PHF | DFI® with four 38mm Keihin throttle bodies, oval sub-throttles, two injectors per throttle body | 3x Mikuni VM22SC, Ø 22 mm carburetor |
| Ignition: | TCBI with electronic advance | Bosch BTZ | TCBI with Digital advance | CDI |
| Starting: | Electric | Electric | Electric | Kick |
| Max Power: | 92.2 kW / 123.6 hp @ 9500 rpm | 55 hp / 39 kW @ 8500 rpm | 91.9 kW /125 hp @ 14000 rpm | 28 hp @7500 rpm |
| Max Torque: | 98.6 Nm / 72.7 lb-ft @ 7700 rpm | 50 Nm / 36.8 lb-ft @ 7000 rpm | 66 Nm / 6.73 kgf-m / 48.7 lb-ft @ 11700 rpm | 2.7 kgf-m / @ 7000 rpm |
| Transmission: | 6 Speed | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Sealed chain | Chain | X-ring chain | Chain |
| Front Suspension: | 41 mm inverted fork with compression and rebound damping and spring preload adjustability | 35mm Marzocchi forks | 41 mm inverted cartridge fork with top-out springs, stepless rebound damping, stepless compression damping, fully-adjustable spring preload | Telescopic hydraulic forks |
| Rear Suspension: | Öhlins S46, horizontal back-link, gas-charged shock with rebound damping and spring preload adjustability | Dual Marzocchi shocks 5-way adjustable preload | Bottom-Link Uni-Trak® with gas-charged shock, top-out spring and pillow ball upper mount, dual-range (high/low-speed) stepless compression damping, 25-way Adjustable rebound damping, fully-adjustable spring preload | Dual shocks, swingarm |
| Front Brakes: | 2x 300 mm Brembo disc, Dual Brembo M4 radial-mount, monobloc, opposed 4-piston caliper | 2x 260mm discs | 2 x 300mm discs, 4 piston calipers | Single disc |
| Rear Brakes: | Single 250mm, 1 piston caliper | Single 260mm disc | Single 210mm disc, 1 piston caliper | 180mm Drum |
| Front Tyre: | 120/70ZR17M/C (58W) | 110/90 H18 | 120/65 ZR17 | 3.25-18 |
| Rear Tyre: | 180/55ZR17M/C (73W) | 110/90 H18 | 180/55 ZR17 | 3.50-18 |
| Wheelbase: | 1455.4 mm / 57.3 in | 1460 mm / 57.4 in | 1405 mm / 55.3 in. | 1374 mm / 54.1 in |
| Fuel Capacity: | 17 Litres / 4.5 US gal | 19.3 Litres / 5.0 US gal | 17 Litres / 4.5 US gal | 14 Litres / 3.7 US gal |