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The Yamaha TDR250 was a street-legal middleweight dual-sport bike produced by Japanese motorcycle manufacturer Yamaha between 1988 and 1993.

This article does not cite any sources. (December 2011)

Yamaha TDR250

Manufacturer	Yamaha Motor Company
Also called	Ultimate Dual
Production	1988 - 1993
Class	Dual Sport
Engine	249cc two-Stroke parallel twin YPVS
Transmission	6-speed constant mesh manual, chain final drive
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)
Related	Yamaha R1-Z, Yamaha TZR250

It was powered by the naturally-aspirated, crankcase reed-valve inducted, liquid-cooled 249cc parallel-twin two-stroke engine from the first generation TZR250 (this same engine also powered the R1-Z). This engine featured the 'YPVS' Yamaha Power Valve System, CDI ignition and digital spark advance . Almost all of the engine, gearbox, and electrical components are interchangeable with the TZR and R1-Z.

The TDR was designed to provide agile handling and quick acceleration both on and off the road, and power delivery was modified to suit its intended use . The special upswept expansion chambers, unique to the TDR, part of this; as well as aiding ground clearance. The bike was originally released in a 250cc format, but a 240cc derivative was also produced 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	1.4 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

• [Yamaha Global - https://global.yamaha-motor.com/]

На других языках

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- [en] Yamaha TDR 250

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[fr] Yamaha TDR

La TDR est un modèle de moto de type trail fabriquée par Yamaha. Elle existait en trois motorisations : 125, 240 et 250 cm3. Elle dérive directement de la famille des DT et adopte les mêmes motorisations. Elle est à mi-chemin entre le trail et la routière. Ses dimensions sont très proches d'une machine de plus grosse cylindrée, en particulier de ses grandes sœurs les TDM 850 et 900.

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[it] Yamaha TDR 250

La Yamaha TDR 250[1] è una motocicletta prodotta dalla casa motociclistica giapponese Yamaha Motor a partire dal 1988 fino al 1993.

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