Yamaha DT 250 (1981) vs Yamaha XT 500 (1977)
Comparison technical specifications
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| Make: | Yamaha | Yamaha |
| Model: | DT 250 | XT 500 |
| Years: | 1981 | 1977 |
| Engine: | Two stroke, single cylinder | Four stroke, single cylinder, SOHC, 2 valve |
| Capacity: | 246 cc / 15.0 cu-in | 499 cc / 30.5 cuin |
| Bore x Stroke: | 70 x 64 mm | 87 х 84 mm |
| Cooling System: | Air cooled | Air cooled |
| Compression Ratio: | 6.8:1 | 9.0 :1 |
| Induction: | Single 28mm Mikuni VM28SS | 32mm Mikuni VM32SS carburetor |
| Ignition: | External-rotor magneto; CDI; six-volt battery | Magneto, CB/coil |
| Starting: | Kick | Kick |
| Max Power: | 17 hp 12.6 kW @ 6000 rpm | 32 hp / 23.5 kW @ 6500 rpm |
| Max Torque: | 20.7 Nm / 15.3 lb-ft @ 5500 rpm | 4.0 kgf-m / 39.2 Nm @ 5500 rpm |
| Transmission: | 5 Speed | 5 Speed |
| Final Drive: | Chain | Chain |
| Frame: | Double-downtube, full-cradle, mild-steel frame; tubular-section, mild-steel swing arm | Half-duplex cradle |
| Front Suspension: | Oil-damped, coil-spring fork with forward-mounted axle and | Leading axle coil spring fork |
| Front Wheel Travel: | 195 mm / 7.6 in | 195 mm / 7.6 in |
| Rear Suspension: | DeCarbon-type, nitrogen-charged mono-shock producing | Swing arm adjustable preload |
| Rear Wheel Travel: | 152 mm / 5.9 in | 142 mm / 5.5 in |
| Front Brakes: | Conical hub with drum brake | Single 160mm drum |
| Rear Brakes: | Conical hub with rod-actuated drum brake | Single 150mm drum |
| Front Tyre: | 3.00-21 | 3.00-21 |
| Rear Tyre: | 4.00-18 | 4.00-18 |
| Dimensions: | Width 870 / 34.2 in | Length 2185 mm / 86.0 in Width 875 mm / 34.4 in Height 1165 mm / 45.8 in |
| Wheelbase: | 1420 mm / 55.9 in | 1415 mm / 55.7 in |
| Seat Height: | 856 mm / 33.7 in | 840 mm / 33.0 in |
| Ground Clearance: | 255 mm / 10.0 in | 215 mm / 8.4 in |
| Dry Weight: | 122 kg / 269 lbs | 140 kg / 308.6 lbs |
| Fuel Capacity: | 8.5 Litres / 2.2 gal | 8.8 Litres / 2.3 US gal |