| MODEL | YAMAHA XT 250T 1984 - 1987 |
| Year | 1984 - 1987 |
| Engine Type | Four stroke, single cylinder, SOHC, 4 valve |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | 73 x 59.6 mm |
| Compression Ratio | 9.5:1 |
| Cooling System | Air cooled |
| Max Power | 20.1 kW / 27 hp @ 9000 rpm |
| Max Torque | 15.9 lb-ft (2.2 kgf-m) @ 7500 rpm |
| Ignition | CDI |
| Induction | Carburettors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | 35 mm Kayaba air-assisted forks |
| Rear Suspension | Monoshock |
| Front Brakes | Single disc |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 113 kg / 249 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00-21 |
| Rear Tyre | 4.60-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 8.9 Litres / 2.3 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The 1984 XT 250T kept the four-valve air-cooled single with twin carburettors and Yamaha's YDIS intake, plus a counterbalancer for smoother running. Changes aimed at making it lighter and more agile included air-assisted forks and a link-type rear monoshock.
