Kawasaki Z 250FS (1981-82) vs Yamaha YZF-R3 (2015) vs Yamaha SR 500 (1978-79)
Comparison technical specifications
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| Make: | Kawasaki | Yamaha | Yamaha |
| Model: | Z 250FS | YZF-R3 | SR 500 |
| Years: | 1981-82 | 2015 | 1978-79 |
| Engine: | Four stroke, parallel twin, SOHC, 2 valve per cylinder | Four stroke, parallel twin cylinder, 4 valve per cylinder | Four stroke, single cylinder, SOHC, 2 valves per cylinder. |
| Capacity: | 248 cc / 15.1 cub in | 321 cc / 19.5 cu-in | 499 cc / 30.4 cu-in |
| Bore x Stroke: | 55 х 52.4 mm | 68.0 x 44.1mm | 87 х 84 mm |
| Cooling System: | Air cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 8.9:1 | 11.2:1 | 9.0:1 |
| Induction: | 2 x 32mm Keihin carburetors | Electronic Fuel Injection | 34mm Mikuni VM34SS carburetor |
| Ignition: | Battery and coil | TCI: Transistor Controlled Ignition | CDI |
| Starting: | Electric | Electric | Kick |
| Max Power: | 14.2 kW / 19 hp @ 8 000 rpm | 30.9 kW 41.4 hp @ 10750 rpm | 31.5 hp / 23.5 kW @ 6500 rpm |
| Max Torque: | 18 Nm / 1.8 kgf-m / 12.9 lb-ft @ 7 000 rpm | 29.6 Nm / 3.0 kg-m @ 9000 rpm | 36.3 Nm / 26.8 lb-ft @ 5500 rpm |
| Transmission: | 5 Speed | Constant Mesh, 6-speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain |
| Front Suspension: | Telescopic fork, air assisted | 41mm KYB® telescopic fork | 35mm telescopic forks |
| Rear Suspension: | Swing arm 5-way adjustable spring preload | KYB® single shock | Dual shock, 5-way adjustable spring preload. |
| Front Brakes: | Drum | Single 298mm disc 2 piston caliper | Single 200mm disc |
| Rear Brakes: | Drum | Single 220mm disc 1 piston caliper | 150mm drum |
| Front Tyre: | 3.00-18 | 110/70-17M/C 54H | 3.50 S19 |
| Rear Tyre: | 3.50-18 | 140/70-17M/C 66H | 4.00 S18 |
| Seat Height: | 737 mm / 29 in | 779.7 mm / 30.7 in | 810 mm / 32 in |
| Fuel Capacity: | 9.1 Litres / 2.4 US gal | 14 Litres / 3.7 US gal | 12 Litres / 3.1 US gal |