Kawasaki GPz 500S / EX 500R Ninja (1993) vs Suzuki RG125F Gamma (1992-93) vs Norton F1 JPS (1989)
Comparison technical specifications
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| Make: | Kawasaki | Suzuki | Norton |
| Model: | GPz 500S / EX 500R Ninja | RG125F Gamma | F1 JPS |
| Years: | 1993 | 1992-93 | 1989 |
| Engine: | Four stroke, parallel twin cylinders. DOHC, 4 valves per cylinder. | Two stroke, single cylinder, crankcase reed valve | Twin chamber rotary |
| Capacity: | 498 cc / 30.4 cu-in | 124 cc / 7.6 cu-in | 588 cc / 35.9 cu in |
| Cooling System: | Liquid cooled, | Liquid cooled | Liquid cooled |
| Compression Ratio: | 10.8:1 | 7.4:1 | 9.0:1 |
| Induction: | 2x Keihin CVK34 carburetor | 28mm Mikuni carburetor | 2 x Ø34 mm Mikuni BDS downdraft carburetors |
| Starting: | Electric | Electric | Electric |
| Max Power: | 60 hp / 43.7 kW @ 9800 rpm | 16,5 kW / 22 hp @ 10.000 rpm | 67.1 kW / 90 hp @ 9000 rpm |
| Max Torque: | 46.1 Nm / 4.7 kg-m @ 8500 rpm | 17,4 Nm / 1,7 kg-m / 12.8 lb-ft @9000 rpm | 77.3 Nm / 7.88 kgf-m / 57 ft-lb @ 7500 rpm |
| Transmission: | 6 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | 38mm Telescopic forks | Upside-down forks | WP upside-down forks, compression and rebound damping adjustable. |
| Rear Suspension: | Swinging arm, single shock adjustable for spring preload | Monoshock preload adjustable. | WP monoshock, compression and rebound damping adjustable. |
| Front Brakes: | Single 270mm disc 2 piston caliper | Single 300 mm disc, 4 piston caliper | 2 x Ø320 mm discs |
| Rear Brakes: | 160mm drum | Single 210 mm disc, 2 piston caliper | Single Ø230 mm disc |
| Front Tyre: | 100/90-16 | 110/80-17 52S | 120/79 ZR17 |
| Rear Tyre: | 120/90-16 | 120/80-17 61S | 170/60 ZR17 |
| Dry Weight: | 170 kg / 370 lbs | 123 kg / 271 lbs | 192 kg / 423 lbs |
| Fuel Capacity: | 15.9 Litres / 4.2 US gal | 14 Litres / 3.7 US gal / 3.1 Imp gal | 20 L / 5.2 US gal |