“Yamaha TDR 250”的意思、由来-开放百科全书

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Yamaha TDR 250

释义

Specifications of TDR 250
External links

{{unreferenced|date=December 2011}}{{Infobox Motorcycle
| name = Yamaha TDR250
| image = Yamaha TDR250.jpg
| image_size = 250px
| aka = Ultimate Dual
| manufacturer = Yamaha Motor Company
| production = 1988 - 1993
| predecessor =
| parent_company =
| class = Dual Sport
| platform =
| engine = 249cc two-Stroke parallel twin YPVS
| transmission = 6-speed constant mesh manual, chain final drive
| rake =
| trail =
| wheelbase = {{convert|1385|mm|in|1|abbr=on}}
| length = {{convert|2145|mm|in|1|abbr=on}}
| width = {{convert|785|mm|in|1|abbr=on}}
| height =
| seat_height = {{convert|820|mm|in|1|abbr=on}}
| dry_weight = {{convert|137|kg|lb|0|abbr=on}}
| wet_weight =
| fuel_economy =
| fuel_capacity = {{Convert|14.0|L|usgal impgal|0|abbr=on}}
| related = Yamaha R1-Z, Yamaha TZR250
}}

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

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 motor 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\|usgal impgal\|0\|abbr=on}}
Oil Capacity	1.4\|L\|usgal impgal\|1\|abbr=on}}
Seat Height	820\|mm\|in\|1\|abbr=on}}
Dry Weight	137\|kg\|lb\|0\|abbr=on}}
Tires	Front 100/90-18H Rear 120/80-17H
Brakes	320\|mm\|in\|1\|abbr=on}} floating disc and 4-pot opposed-piston caliper. Rear Hydraulic disc, with {{convert\|210\|mm\|in\|1\|abbr=on}} disc and opposed-piston caliper
Final drive	Chain

Note: []= French Model

External links

[https://web.archive.org/web/20090811023929/http://www.yamaha-motor.co.jp/global/ Yamaha Motor Co. ltd - YMC- Japan (Global)]

4 : Yamaha motorcycles|Dual-sport motorcycles|Motorcycles introduced in 1988|Motorcycles powered by straight-twin engines

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