Kawasaki GPX 600R Ninja / ZX 600R (1987-88) vs BMW R 60/5 (1971-73) vs Suzuki Boulevard C50 SE (2005-06) vs Victory Kingpin Deluxe (2005) vs Kawasaki ZZ-R 1200 / ZX-12C (2002)
Comparison technical specifications
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| Make: | Kawasaki | BMW | Suzuki | Victory | Kawasaki |
| Model: | GPX 600R Ninja / ZX 600R | R 60/5 | Boulevard C50 SE | Kingpin Deluxe | ZZ-R 1200 / ZX-12C |
| Years: | 1987-88 | 1971-73 | 2005-06 | 2005 | 2002 |
| Engine: | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder | Four stroke, two cylinder horizontally opposed Boxer, pushrod operated 2 valves per cylinder. | Four stroke, 45° V-Twin | Four stroke, 50° V twin SOHC, 4 valves per cylinder, self-adjusting cam chains, hydraulic lifters | Four stroke, transverse four cylinder, DOHC, 4 valves per cylinder. |
| Capacity: | 598 cc / 36.1 cu-in | 599 cc / 36.6 cu in. | 805cc / 49.1 cu-in | 1507 cc / 91.9 cu-in | 1164 cc / 71.0 cu-in |
| Bore x Stroke: | 60 x 52.4 mm | 73.5 x 70.6 mm | 83 x 74.4 mm | 97 x 102 mm | 78 x 59 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled | Air/oil cooled | Liquid cooled |
| Compression Ratio: | 11.71 | 9.2:1 | 9.4:1 | 9.2:1 | 10.6:1 |
| Induction: | 4x 32mm Keihin CV carburetors | 2 x Bing slide carburetors | Mikuni BDSR34 | Electronic Fuel Injection with 44mm throttle bodies | 4x Keihin CVKD40, TPS |
| Starting: | Electric | Kick | Electric | Electric | Electric |
| Transmission: | 6 Speed | 4 Speed | 5 Speed | 5 Speed | 6 Speed |
| Final Drive: | Chain | Shaft | Shaft | Carbon Fiber Reinforced Belt | Chain |
| Front Suspension: | 38mm Telescopic with electronic anti-drive. | Telescopic hydraulic forks | Telescopic forks, coil spring oil damping | Inverted cartridge telescopic fork | Cartridge-style fork with preload adjustment |
| Rear Suspension: | Rising rate monoshock with adjustable preload and rebounding preload. | Long swinging arm with strut | Link-type single shock, 7-way adjustable preload | Single, mono-tube gas forged and cast aluminum w/ rising-rate linkage 100mm wheel travel, preload adjustable spring | UNI-TRAK® system with remote reservoir shock with preload adjustment |
| Front Brakes: | 2x 270mm discs | ∅200mm Drum | Single 300 mm disc 2 piston caliper | Single 300mm floating rotor 4 piston caliper | 2x 320mm discs 6 piston calipers |
| Rear Brakes: | Single 130mm disc | ∅200mm Drum | Drum, 180 mm | Single 300mm floating rotor 2 piston caliper | Single 250mm disc 2 piston caliper |
| Front Tyre: | 110/80 V16 | 3.25 - S19 | 130/90-16M/C 67H | 130/70-18 | 120/70 ZR17 |
| Rear Tyre: | 130/90 V16 | 4.00 - S18 | 170/80-15M/C 77H | 180/55-B18 | 180/55-ZR17 |
| Fuel Capacity: | 19.5 Litres / 5.1 US gal | 24 liters / 6.3 US gal | 15.5 Litres / 4.1 US gal | 17 Litres / 4.5 US gal | 23 Litres / 6.0 US gal |