| MODEL | YAMAHA TT 250 1980 |
| Year | 1980 |
| Engine Type | Four stroke, single cylinder |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | 75 x 56.5 mm |
| Compression Ratio | 9.7:1 |
| Cooling System | Air cooled |
| Max Power | 16.1 kW / 22 hp @ 8000 rpm |
| Max Torque | 2.0 kgf-m / 14.4 lb-ft @ 6500 rpm |
| Ignition | Flywheel-magneto CDI |
| Induction | 30 mm Mikuni slide carburettor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 5 speed |
| Clutch | Wet, multi-plate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Tubular mild steel, single front downtube |
| Front Suspension | 36 mm stanchion tube diameter, 225 mm / 8.8 in travel |
| Rear Suspension | Adjustable preload monoshock, 191 mm / 7.5 in travel |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | 838 mm / 33 in |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | 100.8 kg / 242 lbs |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 3.00-21 |
| Rear Tyre | 5.10-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 7.5 Litres / 2.0 US gal |
| Fuel Consumption | — |
| Top Speed | — |
The TT250 was a light four-stroke playduro-style trail bike rather than a competition motocross machine, with a torquey 249 cc air-cooled single. A Cycle Guide test cited on the source page liked its low weight and seat height but found the drum brakes and suspension soft. It later became a popular base for aftermarket modification.
