Yamaha WR 250Z (1998) vs Yamaha RD 250LC / RZ 250LC (1981) vs Triumph Bonneville 750 T140E (1979)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Triumph |
| Model: | WR 250Z | RD 250LC / RZ 250LC | Bonneville 750 T140E |
| Years: | 1998 | 1981 | 1979 |
| Engine: | Two stroke, single cylinder | Two stroke, parallel twin | Four stroke, parallel twin, OHV, 2 valves per cylinder |
| Capacity: | 249 cc / 15.2 cu-in | 247 cc / 15.0 cu-in | 744 cc / 45.4 cu in |
| Bore x Stroke: | 68 x 68.8 mm | 54 х 54 mm | 76 x 82 mm |
| Cooling System: | Liquid cooled | Liquid cooled | Air cooled |
| Compression Ratio: | 10.9:1 | 6.2 :1 | 8.6:1 |
| Induction: | Mikuni VM38SS carburetor | 2x Mikuni VM28 SC carburetor | 2 x 30 mm Amal carburetors |
| Ignition: | CDI | CDI | Battery / dual coil / dual points / Lucas |
| Starting: | Kick | Kick | Electric and kick |
| Max Power: | 49.8 hp / 37.2 kW @ 8250 rpm | 35.5 hp / 26.1 kW @ 8500 rpm　 | 40.3 kW / 54 hp @ 6200 rpm |
| Max Torque: | 4.69 kgf-m / 44.5 Nm @ 7500 rpm | 30.2 Nm / 3.1 kgf-m@ 8000 rpm | 56.6 Nm / 5.77 kgf-m / 41.8 ft-lb @5500 rpm |
| Clutch: | Multi-plate wet clutch | Wet multi-plate | Wet, multiplate |
| Transmission: | 5 Speed | 6 Speed | 5 Speed |
| Final Drive: | Chain | Chain | Chain, 106 links |
| Front Suspension: | 43mm inverted fork | Telescopic forks | Telescopic forks |
| Rear Suspension: | Monocross, swinging arm | Monocross | Swingarm, Girling shocks, 3-way spring preload adjustable |
| Front Brakes: | Single 204mm disc | Single 267mm disc | Single 254 mm disc, 1 piston caliper |
| Rear Brakes: | Single 189mm disc | Drum | Single 254 mm disc, 1 piston caliper |
| Front Tyre: | 80/100-21 | 3.00-18 | 3.25-19 |
| Rear Tyre: | 110/100-18 | 3.50-18 | 4.00-18 |
| Wheelbase: | 1480 mm / 58.2 in | 1360 mm / 53.5 in | 1422 mm / 56 in |
| Seat Height: | 978 mm / 38.5 in | 785 mm / 30.9 in | 813 mm / 32.0 in |
| Dry Weight: | 103 kg / 227 lbs | 139 kg / 306.4 lbs | 200 kg / 441 lbs |
| Fuel Capacity: | 13 Litres / 3.4 US gal | 16.5 Litres / 4.3 US gal | 18.2 Litres / 4.8 US gal / 4.0 Imp gal |