Yamaha TDR 250

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Yamaha TDR 250
Yamaha TDR250.jpg
Also calledUltimate Dual
Production1988 - 1993
ClassDual Sport
EngineTwo-Stroke Parallel Twin YPVS
Transmission6 Speed Constant Mesh
Wheelbase1,385 mm (54.5 in)
Seat height820 mm (32.3 in)
Weight137 kg (302 lb)
Fuel capacity14.0 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 TZR 250 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.

Specifications of TDR 250

Specifications for 1988 - 1993 model [3]
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

External links

Official websites

Related links