Yamaha TDR 250 (1990-91) vs Yamaha XT 500 (1980) vs Yamaha WR 450F (2003-04)
Comparison technical specifications
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| Make: | Yamaha | Yamaha | Yamaha |
| Model: | TDR 250 | XT 500 | WR 450F |
| Years: | 1990-91 | 1980 | 2003-04 |
| Engine: | Two stroke, parallel twin cylinder, read valve, YPVS | Four stroke, single cylinder, SOHC, 2 valve | Four stroke, single cylinder, DOHC, 5 titanium valve per cylinder. |
| Capacity: | 249 cc / 15.2 cu-in | 499 cc / 30.5 cuin | 449 cc / 27.4 in |
| Bore x Stroke: | 56.4 х 50 mm | 87 х 84 mm | 95 x 63.4 mm |
| Cooling System: | Liquid cooled | Air cooled | Liquid cooled |
| Compression Ratio: | 5.9:1 | 9.0 :1 | 12.5:1 |
| Induction: | 2x 28mm TM28SS Mikuni carburetors | 32mm Mikuni VM32SS carburetor | 39mm Keihin FCR flat-slide throttle position sensor |
| Ignition: | Transistorized | Magneto, CB/coil | Digital CDI |
| Starting: | Kick | Kick | Electric / Kick-starter |
| Max Power: | 46 hp / 37 kW @ 10000 rpm | 32 hp / 23.5 kW @ 6500 rpm | 58 hp / 42.3 kW @ 9000 rpm |
| Max Torque: | 3.7 kgf-m / 26.7 lb-ft @ 8500 rpm | 4.0 kgf-m / 39.2 Nm @ 5500 rpm | 49 Nm / 33.1 lb-ft @ 7000 rpm |
| Transmission: | 6 Speed | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain | "O" ring Chain |
| Front Suspension: | Air assisted telescopic forks 7-way adjustable preload | Leading axle coil spring fork | 46mm Kayaba inverted telescopic fork, compression and rebound damping adjustable |
| Rear Suspension: | Single shock rising rate adjustable preload | Swing arm adjustable preload | Fully adjustable Kayaba single shock, 315mm wheel travel, separate speed compression adjustment |
| Front Brakes: | Single 320mm disc 2 piston calipers | Single 160mm drum | Single 250mm disc 4 piston caliper |
| Rear Brakes: | Single 210mm disc single piston caliper | Single 150mm drum | Single 245mm disc 2-piston caliper |
| Front Tyre: | 110/90-18 | 3.00-21 | 80/100-21 |
| Rear Tyre: | 120/80-17 | 4.00-18 | 110/100-18 |
| Dimensions: | Length 2145 mm / 84.4 in Width 785 mm / 30.9 in Height 1215 mm / 47.8 in | Length 2160 mm / 85.0 in Width 875 mm / 34.4 in Height 1165 mm / 45.8 in | Length 2175 mm / 85.6 in Width 825 mm / 32.5 in Height 1300 mm / 51.2 in |
| Wheelbase: | 1385 mm / 54.5 in | 1475 mm / 58.0 in | 1485 mm / 58.5 in |
| Seat Height: | 820 mm / 32.2 in | 840 mm / 33.0 in | 998 mm / 39.3 in |
| Ground Clearance: | 230 mm / 9.0 in | 215 mm / 8.4 in | 365 mm / 14.3 in |
| Dry Weight: | 137 kg / 302 lbs | 140 kg / 308.6 lbs | 112.5 kg / 248 lbs |
| Fuel Capacity: | 14 Litres / 3.6 US gal | 8.8 Litres / 2.3 US gal | 8 Liters / 2.1 US gal |