| MODEL | YAMAHA DT-1 250 1968 - 1970 |
| Year | 1968 - 1970 |
| Engine Type | Two stroke, single cylinder |
| Displacement / Capacity | 246 cc / 15.0 cu in |
| Bore X Stroke | 70 x 64 mm |
| Compression Ratio | 6.4:1 |
| Cooling System | Air cooled |
| Max Power | 16.8 kW / 22.8 hp @ 7000 rpm |
| Max Torque | 23.7 Nm / 17.5 lb-ft @ 6500 rpm |
| Ignition | Flywheel magneto |
| Induction | Carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Autolube |
| Gear Box | 5 Speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Duplex cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | 2100.5 mm / 82.7 in |
| Overall Width | 889.0 mm / 35.0 in |
| Overall Height | 1160.7 mm / 45.7 in |
| Seat Height | — |
| Wheelbase | 1389.3 mm / 54.7 in |
| Ground Clearance | 254 mm / 10.0 in |
| Dry Weight | 111 kg / 245 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.25-19 |
| Rear Tyre | 4.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 9 Litres / 2.5 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The DT-1 was Yamaha's first purpose-built dual-sport bike, launched in 1968 when riders were still converting road bikes into scramblers. It sold through its first 12,000-unit run quickly and effectively created the trail-bike class in the US. Its air-cooled two-stroke 250 was paired with a five-speed gearbox and Autolube oil injection.
