| MODEL | YAMAHA TZR 250 SP 1990 |
| Year | 1990 |
| Engine Type | Two stroke, parallel twin cylinder, reed valve |
| Displacement / Capacity | 249 cc / 15.2 cu in |
| Bore X Stroke | 56.4 x 50 mm |
| Compression Ratio | 5.9:1 |
| Cooling System | Liquid cooled |
| Max Power | 36.4 kW / 50 hp @ 10000 rpm |
| Max Torque | 35.5 Nm / 26.2 lb-ft @ 9750 rpm |
| Ignition | CDI |
| Induction | 2x Mikuni TM28SS carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | 6 speed |
| Clutch | — |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic fork, adjustable preload (140 mm / 5.5 in travel) |
| Rear Suspension | Coil and gas spring, 9-way preload (100 mm / 3.9 in travel) |
| Front Brakes | Single 320 mm disc, 2 piston caliper |
| Rear Brakes | Single 210 mm disc, 1 piston caliper |
| DIMENSION SPECS | |
| Overall Length | 2005 mm / 78.9 in |
| Overall Width | 660 mm / 25.9 in |
| Overall Height | — |
| Seat Height | 760 mm / 29.9 in |
| Wheelbase | 1375 mm / 54.1 in |
| Ground Clearance | — |
| Dry Weight | 128 kg / 282.1 lbs |
| Wet Weight | 140 kg / 308.6 lbs |
| WHEEL SPECS | |
| Front Tyre | 100/80-17 |
| Rear Tyre | 120/80-17 |
| FUEL SYSTEM | |
| Fuel Capacity | 16 Litres / 4.2 US gal |
| Fuel Consumption | — |
| Top Speed | — |
Sporty 250 cc two-stroke twin from the last parallel-twin generation of the TZR, before Yamaha moved to a V-twin engine in 1991. The SP tag marks a higher-spec version of the 1990 bike, with a 50 hp claimed output on this source.
