| MODEL | YAMAHA IT 250 1981 |
| Year | 1981 |
| 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 | 23.6 kW / 32.2 hp @ 7500 rpm |
| Max Torque | 35 Nm / 26 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 | Single downtube, full cradle chrome-moly frame with aluminium swing arm |
| Front Suspension | 38 mm telescopic forks, 270 mm / 10.6 in travel |
| Rear Suspension | Swing arm with monoshock, 270 mm / 10.6 in travel |
| Front Brakes | Drum, 130 x 22 mm shoes |
| Rear Brakes | Drum, 150 x 25 mm shoes |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 919.4 mm / 36.2 in |
| Wheelbase | 1486 mm / 58.5 in |
| Ground Clearance | 287 mm / 11.3 in |
| Dry Weight | — |
| Wet Weight | 112 kg / 248 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00 x 21 |
| Rear Tyre | 5.10 x 18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12.8 Litres / 3.4 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1981 IT 250 kept the 1980 engine but grew in wheelbase, seat height and ground clearance, and its tank gained a little capacity. It remained a drum-braked, long-travel enduro bike with 38 mm forks.
