Kawasaki GPX 600R Ninja / ZX 600R (1987-88) vs Triumph Bonneville Bobber TFC (2020) vs Suzuki Boulevard C50 (2013-14) vs Kawasaki Z 900 (2022)
Comparison technical specifications
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| Make: | Kawasaki | Triumph | Suzuki | Kawasaki |
| Model: | GPX 600R Ninja / ZX 600R | Bonneville Bobber TFC | Boulevard C50 | Z 900 |
| Years: | 1987-88 | 2020 | 2013-14 | 2022 |
| Engine: | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder | Four stoke, parallel twin, 270o crank, SOHC, 4 valve per cylinder | Four stroke, 45° V-Twin | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder |
| Capacity: | 598 cc / 36.1 cu-in | 1198 cc / 73.1 cu in | 805cc / 49.1 cu-in | 948 cc / 57.8 cu-in |
| Bore x Stroke: | 60 x 52.4 mm | 97.6 x 80 mm | 83 x 74.4 mm | 73.4 x 56.0 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Liquid cooled | Liquid cooled |
| Compression Ratio: | 11.71 | 9.4:1 | 11.8:1 | |
| Lubrication: | Wet sump | Wet sump | Wet sump | Forced lubrication, wet sump |
| Induction: | 4x 32mm Keihin CV carburetors | Multipoint sequential electronic fuel injection | Mikuni BDSR34 | Fuel injection: 36 mm x 4 with sub-throttle |
| Ignition: | Digital | Digital | Electronic | TCBI with electronic advance |
| Starting: | Electric | Electric | Electric | Electric |
| Max Power: | 84 hp / 62 kW @ 11000 rpm | 86 hp / 64 kW @ 6250 rpm | 39 kW / 52 hp @ 6000 rpm | 92.2 kW / 123.6 hp @ 9500 rpm |
| Max Torque: | 42 ft-lb / 5.8kgf-m @ 9000 rpm | 100 Nm / 81 lb-ft @ 4500 rpm | 69 Nm / 7.04 kgf-m / 51 lb-ft @ 3200 rpm | 98.6 Nm / 72.7 lb-ft @ 7700 rpm |
| Clutch: | Wet, multiple discs, cable operated | Wet, multi-plate | Wet, multiple discs, cable operated | Wet multi-disc, manual |
| Transmission: | 6 Speed | 6 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Chain, X-ring | Shaft | Sealed chain |
| Front Suspension: | 38mm Telescopic with electronic anti-drive. | 43mm Öhlins NIX30 inverted fork, fully adjustable | Telescopic forks, coil spring oil damping | 41 mm inverted fork with rebound damping and spring preload adjustability |
| Rear Suspension: | Rising rate monoshock with adjustable preload and rebounding preload. | Linkage-assisted, rebound-damping and spring-preload adjustable Öhlins RSU shock | Link-type single shock, 7-way adjustable preload | Horizontal Back-link with rebound damping and spring preload adjustability |
| Front Brakes: | 2x 270mm discs | 2x 310 mm Discs, Brembo M50 4-piston monoblock calipers and Brembo MCS radial master cylinder | Single disc, 2 piston caliper | 2x 300 mm semi-floating discs, dual opposed 4 piston calipers |
| Rear Brakes: | Single 130mm disc | Single 255 mm disc,, Nissin single-piston floating caliper | Drum | Single 250mm petal disc, 1 piston caliper |
| Front Tyre: | 110/80 V16 | 100/90 x 19 | 130/90-16M/C 67H, tube type | 120/70ZR17M/C (58W) |
| Rear Tyre: | 130/90 V16 | 150/70 x 16 | 170/80-15M/C 77H, tube type | 180/55ZR17M/C (73W) |
| Trail: | 91 mm / 3.6 in | TBD | 140 mm / 5.5 in | 110 mm / 4.3 in |
| Wheelbase: | 1425 mm / 56.1 in | TBD | 1655 mm / 65.2 in | 1455.4 mm / 57.3 in |
| Fuel Capacity: | 19.5 Litres / 5.1 US gal | 9.1 Litres / 2.4 US gal | 15.5 Litres / 4.1 US gal | 17 Litres / 4.5 US gal |