Yamaha TDR 250

Yamaha TDR 250
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

The engine is essentially a Yamaha TZR250 unit with a modified power delivery to suit the TDR's intended use - 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
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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