| MODEL | YAMAHA IT 250 1978 - 1979 |
| Year | 1978 - 1979 |
| Engine Type | Two stroke, single cylinder, reed valve |
| Displacement / Capacity | 246 cc / 15.07 cu in |
| Bore X Stroke | 70 x 64 mm |
| Compression Ratio | 7.8:1 |
| Cooling System | Air cooled |
| Max Power | 19 kW / 26.1 hp @ 7500 rpm |
| Max Torque | 25 Nm / 18.5 lb-ft @ 7500 rpm |
| Ignition | CDI |
| Induction | 36 mm Mikuni carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 Speed |
| Clutch | Wet, multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Double downtube, full cradle |
| Front Suspension | Telescopic forks |
| Rear Suspension | Swing arm with monoshock |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 889 mm / 35 in |
| Wheelbase | 1430 mm / 56.3 in |
| Ground Clearance | 241.3 mm / 9.5 in |
| Dry Weight | — |
| Wet Weight | 124 kg / 275 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00 x 21 |
| Rear Tyre | 4.50 x 18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The first IT 250 brought a rear monoshock to a 250 cc air-cooled enduro bike. It was relatively mild in output and heavier than the later versions, with drum brakes and a double-downtube frame.
