1975 Yamaha DT250
Specifications and workshop reference information for the 1975 Yamaha DT250, including engine, chassis, service data and setup details.
Note: Specs are compiled from factory data, manuals and owner feedback. Bikes vary — if yours is different, jump into the forum and share it.
General Specifications
| Engine Type | Air-cooled 2-stroke single-cylinder reed valve |
| Displacement | 246 cc |
| Bore × Stroke | 70.0 mm × 64.0 mm |
| Compression Ratio | 6.7:1 |
| Maximum Power | Approx. 21 hp |
| Maximum Torque | — |
| Carburetor | Mikuni VM28 |
| Lubrication | Autolube oil injection |
| Fuel Mix Ratio | — |
| Ignition | Contact breaker (points) |
| Spark Plug | NGK B8ES |
| Spark Plug Gap | 0.6–0.7 mm |
Transmission
| Transmission Type | 5-speed constant mesh |
| Clutch | Wet multi-plate |
| Primary Reduction | 2.952 |
| Final Reduction | 3.214 |
| Overall Reduction | — |
Dimensions
| Overall Length | 2130 mm |
| Overall Width | 830 mm |
| Overall Height | 1150 mm |
| Wheelbase | 1390 mm |
| Ground Clearance | 240 mm |
| Fuel Tank Capacity | 9.5 L |
Chassis
| Frame Type | Steel single cradle |
| Caster Angle | 27.5° |
| Trail | 110 mm |
| Front Suspension | Telescopic forks |
| Rear Suspension | Twin shock swingarm |
| Front Suspension Travel | 180 mm |
| Rear Suspension Travel | 160 mm |
Brakes & Wheels
| Front Tire | 3.00-21 |
| Rear Tire | 4.00-18 |
| Front Brake | Drum |
| Rear Brake | Drum |
250cc Other Specs
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