Kawasaki Z 550F (1979) vs BMW R 75/6 (1973-76) vs Kawasaki ZX-7R Ninja (1998-99) vs BMW F 800GS Adventure (2015) vs Kawasaki Zephyr 400 X (1998-00)
Comparison technical specifications
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| Make: | Kawasaki | BMW | Kawasaki | BMW | Kawasaki |
| Model: | Z 550F | R 75/6 | ZX-7R Ninja | F 800GS Adventure | Zephyr 400 X |
| Years: | 1979 | 1973-76 | 1998-99 | 2015 | 1998-00 |
| Engine: | Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder. | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. | Four stroke, parallel twin cylinder, DOHC, 4 valves per cylinder | Four stroke parallel twin cylinder. DOHC, 4 valves per cylinder |
| Capacity: | 553 cc / 33.7 cu-in | 745 cc / 45.5 cu in. | 748 cc / 45.6 cu-in | 798 cc / 47.7 cub. in. | 399 cc / 24.4 cu-in |
| Bore x Stroke: | 58 x 52.4 mm | 82 x 70.6 mm | 73 x 44.7 mm | 82 x 75.8 mm | 55 х 42 mm |
| Compression Ratio: | 9.5:1 | 9.0:1 | 11.5:1 | 12.0:1 | 10.3:1 |
| Induction: | 4x 22mm TK | 2 x Bing constant depression carbutetors | 4x 38mm Keihin CVKD carburetors | Electronic intake injection, ∅45mm throttle bodies | 4X Keihin CVK30 carburetors |
| Ignition: | CDI | Battery ignition | Digital | Digital CDI | Full transistor |
| Starting: | Electric | Electric | Electric | Electric | Electric |
| Max Power: | 58 hp / 43.2 kW @ 9000 rpm | 36.8 kW /50 hp @ 6200 rpm | 111.9 hp / 83.4 kW @ 11700 rpm | 62.5 kW / 85 hp @ 7500 rpm | 49 hp / 36.8 kW @ 11000 rpm |
| Max Torque: | 35.5 ft-lb / 48.1 Nm @ 7000 rpm | 60 Nm / 6.1 kgf-m / 44 ft lb @ 5000 rpm | 7.7 kgf-m / 55.6 lb-ft @ 9500 rpm | 80 Nm / 8.2 kgf-m / 59 lb-ft @ 5750 rpm | 3.1 kgf m / 22.4 lb-ft @ 10500 rpm |
| Transmission: | 6 Speed | 4 Speed | 6 Speed | 6 Speed | 6 Speed |
| Final Drive: | Chain | Shaft | Sealed chain | Chain | Chain |
| Front Suspension: | 36mm Telescopic forks | Telescopic hydraulic forks | 43mm inverted cartridge fork, adjustable preload, fully adjustable compression and rebound damping | 43mm Marzocchi upside down forks | Telescopic forks |
| Rear Suspension: | Dual shock, 5-way preload | Long swinging arm with strut. 125mm wheel travel | Piggy-back reservoir rear shock offers adjustable compression and rebound damping, preload and ride height to match a wide range of operating conditions. | Double strut swing arm aluminium coast in one piece | Dual shocks |
| Front Brakes: | 2X 250mm disc | ∅200mm Drum | 2x 320mm discs 6 pistons calipers | 2 x ∅300mm discs, 4 piston calipers, ABS | 2x discs |
| Rear Brakes: | Single disc | ∅200mm Drum | Single 230mm disc 2 piston caliper | Single ∅265mm disc, 2 piston caliper, ABS | Single disc |
| Front Tyre: | 3.25-19 | 3.25 - S19 | 120/70 ZR17 | 90/90 - 21 54V | 110/80-17 |
| Rear Tyre: | 3.75-18 | 4.00 - S18 | 190/50 ZR17 | 150/70 - 17 69V | 140/70-18 |
| Fuel Capacity: | 14 Litres / 3.6 US gal | 24 Litres / 6.3 US gal | 18 Litres / 4.7 US gal | 24 Litres / 6.3 US gal. | 14 Litres / 3.6 US gal |