Yamaha TDR 250

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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)
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 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.

Contents

[edit] 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

[edit] External links

[edit] Official websites

[edit] Related links