Yamaha RD 250LC / RZ 250LC (1981) vs Yamaha XT 500 (1977) vs Kawasaki Z 750F Export (1979)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Kawasaki |
| Model: | RD 250LC / RZ 250LC | XT 500 | Z 750F Export |
| Years: | 1981 | 1977 | 1979 |
| Engine: | Two stroke, parallel twin | Four stroke, single cylinder, SOHC, 2 valve | Four stroke, transverse four cylinder. DOHC, 2 valve per cylinder |
| Capacity: | 247 cc / 15.0 cu-in | 499 cc / 30.5 cuin | 746 cc / 45.5 cu-in |
| Bore x Stroke: | 54 х 54 mm | 87 х 84 mm | 64 х 58 mm |
| Cooling System: | Liquid cooled | Air cooled | Air cooled |
| Compression Ratio: | 6.2 :1 | 9.0 :1 | NA |
| Induction: | 2x Mikuni VM28 SC carburetor | 32mm Mikuni VM32SS carburetor | 4x Mikuni VM 28 SC carburetors |
| Ignition: | CDI | Magneto, CB/coil | Battery & coil |
| Starting: | Kick | Kick | Electric & kick |
| Max Power: | 35.5 hp / 26.1 kW @ 8500 rpm　 | 32 hp / 23.5 kW @ 6500 rpm | 70 hp / 52.1 kW @ 9000 rpm |
| Max Torque: | 30.2 Nm / 3.1 kgf-m@ 8000 rpm | 4.0 kgf-m / 39.2 Nm @ 5500 rpm | 5.9 kgf-m / 42.6 lb-ft @ 7500 rpm |
| Transmission: | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain, 96 Link |
| Front Suspension: | Telescopic forks | Leading axle coil spring fork | Telescopic forks |
| Rear Suspension: | Monocross | Swing arm adjustable preload | Swing arm dual shocks |
| Front Brakes: | Single 267mm disc | Single 160mm drum | 2x disc |
| Rear Brakes: | Drum | Single 150mm drum | Drum |
| Front Tyre: | 3.00-18 | 3.00-21 | 3.25-19 |
| Rear Tyre: | 3.50-18 | 4.00-18 | 4.00-18 |
| Dry Weight: | 139 kg / 306.4 lbs | 140 kg / 308.6 lbs | 230 kg / 507 lbs |
| Fuel Capacity: | 16.5 Litres / 4.3 US gal | 8.8 Litres / 2.3 US gal | 17.7 Litres / 4.6 US gal |