Kawasaki ZX-6R Ninja (1999) vs Yamaha YZF 750R (1995) vs Yamaha YDS-7 (1972)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Yamaha |
| Model: | ZX-6R Ninja | YZF 750R | YDS-7 |
| Years: | 1999 | 1995 | 1972 |
| Engine: | Four stroke, transverse four cylinders, DOHC, 4 valve per cylinder | Four stroke, transverse four cylinder, DOHC, 5 valves per cylinder. | Two stroke, piston-port, parallel twin |
| Capacity: | 598cc / 36.5 cub in. | 749 cc / 45.7 cu-in | 247 cc / 15.0 cu-in |
| Bore x Stroke: | 64 x 46.6 mm | 72 x 46 mm | 54 x 54 mm |
| Compression Ratio: | 12.0:1 | 11.5:1 | 7.5;1 |
| Cooling System: | Liquid cooled | Liquid cooled | Air-cooled |
| Induction: | 4 x 36mm Keihin CVKD36 carburetors | 4x Mikuni BDST38 carbs | 26mm Mikuni |
| Ignition: | Digital | T.C.I. Digital / electric | Mitsubishi contact breaker |
| Starting: | Electric | Electric | Kick |
| Max Power: | 76.5 kW / 105 hp @ 12500 rpm | 125 hp / 91.1 kW @ 12000 rpm | 30 hp @7500 rpm |
| Max Torque: | 63.7 Nm / 6.5 kgf-m / 47.0 lb-ft @ 10000 rpm | 80.4 Nm / 8.2 kgf-m / 59.3 lb-ft @ 9500 rpm | 21 ftlb @ 7000 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed Helical-gear primary drive. Rear chain % x %in with top guard. Engine rpm at 30 mph in top gear, approximately 2,500. |
| Final Drive: | Chain | Chain | Chain |
| Wheelbase: | 1466 mm / 57.7 in. | 1,420 mm / 55.9 in | 1300 mm / 51.1 in |
| Front Suspension: | 41mm Showa telescopic forks. | 41mm USD forks adjustable preload rebound and compression | 34mm Telescopic forks |
| Rear Suspension: | Showa sing shock, adjustable preload and rebounding preload. | Monocross adjustable preload rebound | Twin shock |
| Front Brakes: | 2 x 270mm discs, 4 piston calipers | 2x 320mm discs 6 piston calipers | 180mm twin leading shoe drum |
| Rear Brakes: | Single 130mm disc, 1 piston caliper | Single 245mm disc 2 piston caliper | 180mm single leading shoe |
| Front Tyre: | 120/60 ZR17 | 120/70 ZR17 | 300 x 18 |
| Rear Tyre: | 160/60 ZR17 | 180/55 ZR17 | 3.25 x 18 |
| Wet Weight: | 222 kg / 490 lbs | 223 kg / 490 lbs | 145 kg / 320 lbs |
| Fuel Capacity: | 5.6 L/100 km / 18.2 Litres / 4.8 US gal | 19 Litres / 4.3 gal | 11.4 Litres / 3.0 gal |