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| Manufacturer | Yamaha |
|---|---|
| Also called | Ultimate Dual |
| Production | 1988 - 1993 |
| Class | Dual Sport |
| Engine | Two-Stroke Parallel Twin YPVS |
| Transmission | 6 Speed Constant Mesh |
| Wheelbase | 1,385 mm (54.5 in) |
| Dimensions | L 2,145 mm (84.4 in) W 785 mm (30.9 in) |
| Seat height | 820 mm (32.3 in) |
| Weight | 137 kg (302 lb) (dry) |
| Fuel capacity | 14.0 L (4 US gal; 3 imp gal) |
The Yamaha TDR 250 is a dual-purpose motorcycle manufactured by Yamaha between 1988 and 1993. It is powered by a two-stroke parallel twin engine utilizing the Yamaha Power Valve System (YPVS). Designed to provide agile handling and quick acceleration for both on- and off-road use. It was the world's first two-stroke to use a CDI ignition and digital advance system [1]
The engine is essentially a Yamaha TZR250 unit with a modified power delivery to suit the TDR's intended use [2] - many of the parts are interchangeable. It was originally released in a 250 cc format and a 240 cc format exclusively for the French market.
| Engine Type | Parallel Twin Cylinder, Water Cooled, Two-Stroke, YPVS |
|---|---|
| Carburetion | Mikuni TM28SS x 2 |
| Displacement | 249 cc [239 cc] |
| Bore × Stroke | 56.4 x 50.0 mm [55.2 x 50.0 mm] |
| Peak Power | 50.3 PS (37.1 kW) @ 10,000 rpm [44.3 PS (32.6 kW) @ 10,000 rpm] |
| Peak Torque | 3.7 kg-m (36.2 Nm) @8,500 rpm [3.5 kg-m (34.6 Nm) @9,500 rpm] |
| Compression Ratio | 5.9:1 [5.7:11] |
| Fuel Capacity | 14.0 L (4 US gal; 3 imp gal) |
| Oil Capacity | 1.5 L (0.4 US gal; 0.3 imp gal) |
| Seat Height | 820 mm (32.3 in) |
| Dry Weight | 137 kg (302 lb) |
| Tires | Front 100/90-18H Rear 120/80-17H |
| Brakes | Front Hydraulic disc, with 320 mm (12.6 in) floating disc and 4-pot opposed-piston caliper. Rear Hydraulic disc, with 210 mm (8.3 in) disc and opposed-piston caliper |
| Final drive | Chain |
Note: []= French Model
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The contents of this page are derived from <http://en.wikipedia.org/wiki/Yamaha_TDR_250>
Text available under the Creative Commons Attribution-ShareAlike License;
additional terms may apply.
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