Yamaha TDM
Encyclopedia
The Yamaha TDM is an 849 cc two-cylinder motorcycle
Motorcycle
A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...

, manufactured by the Yamaha Motor Company
Yamaha Motor Company
, is a Japanese motorized vehicle-producing company. Yamaha Motor is part of Yamaha Corporation and its headquarter is located in Iwata, Shizuoka. Along with expanding Yamaha Corporation into the world's biggest piano maker, then Yamaha CEO Genichi Kawakami took Yamaha into the field of motorized...

 of Japan
Japan
Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

, that first came out in 1991. With a lot of torque, and 78 horsepower, it is considered to be a very good all-rounder.

Version History

The TDM 850 was the first motorcycle which was designed around the rider and not (as with most bikes in these days) as a bike with a buddyseat. Designing the TDM, Yamaha used a lot of ideas from their "Morpho" project. That is why the positioning of the rider on the TDM 850 was unique in these days and ideal for the longer (+ 1.80 mtr.)riders.
Yamaha wanted to create a motorcycle which was capable of handling the mountain roads of the European Alps and that would cope with the sometimes not so smooth roadsurface.

It was imported into the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 for only two years, 1992 and 1993.

It was never a big seller in the United Kingdom
United Kingdom
The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 or in The Netherlands but in countries such as France and Germany sales were very strong. In 1996 Yamaha released the Mk2 TDM with updated bodywork and a 270 degree instead of a 360 degree firing order. This upgraded engine was first seen on the Japanese market in 1995, when Yamaha introduced the TRX850
Yamaha TRX
Manufactured by the Yamaha Motor Company of Japan, the Yamaha TRX, is a motorcycle with a 849 cc 270° parallel-twin engine. The TRX was Yamaha's first big twin sport bike of the modern era. The TRX first appeared in Japan in 1995 and a version for Europe became available in 1996...

.
Thanks to this update the TDM 850 became a popular bike in the Netherlands as well. (several years in the top 15 of most sold bikes)

In 2001 the 3rd incarnation of TDM arrived, the TDM 900 again with new bodywork, 6 speed gearbox, fuel injection, R1
Yamaha YZF-R1
The Yamaha YZF-R1 is an open class sport bike, or superbike, motorcycle manufactured by Yamaha Motor Company since 1998.-1998–1999:Yamaha launched the YZF-R1 after redesigning the Genesis engine to offset the crankshaft, gearbox input, and output shafts. This "compacting" of the engine made the...

 derived brakes,reduced weight to 190kg dry, and a new smother 900 cc engine. Also it incorporates a diamond shaped aluminum frame & swinging arm.It has slightly wider tyres at 160 rear and 120 front. It has a 2 position trip meter, an analogue clock, and a horizontal bar graph fuel meter.It is available with ABS as an option.

The TDM is classified as New Sports a new class invented by Yamaha
Yamaha
Yamaha may refer to:* Yamaha Corporation, a Japanese company with a wide range of products and services** Yamaha Motor Company, a Japanese motorized vehicle-producing company...

, but most of the people compare it with Dual Sports or Adventure Sports bikes. Its engine was derived from the Paris Dakar winning Yamaha XTZ 750 Super Tenere
Yamaha XTZ 750
The Yamaha XTZ 750 SuperTénéré is a dual-sport motorcycle, produced by Yamaha. It was named after Yamaha's lighter, single-cylinder models which in turn were named after the notorious Ténéré desert stage of the former Paris-Dakar Rally in northeastern Niger.-Background:The XTZ 750 is a larger,...

. Although too large and heavy for serious off-road work, the TDM has a long travel suspension and is well suited for gravel tracks and light off-road use. Most popular modifications include fitting aftermarket exhausts, R1
Yamaha YZF-R1
The Yamaha YZF-R1 is an open class sport bike, or superbike, motorcycle manufactured by Yamaha Motor Company since 1998.-1998–1999:Yamaha launched the YZF-R1 after redesigning the Genesis engine to offset the crankshaft, gearbox input, and output shafts. This "compacting" of the engine made the...

brake calipers, and dual sports tires.

Specifications

Engine

Type 4-stroke, DOHC, liquid-cooled
Forward Inclined Parallel 2-cylinder
Displacement 849 cc
Bore x Stroke 89.5 x 67.5 mm
Compression Ratio 10.5:1
Maximum power (claimed) 78 bhp 56.6 kW)@7500 rpm
Maximum power (True hp, measured) 60-62 true hp @7500 rpm, all stock
Maximum Torque (claimed) 8.1 kg-m @ 6000 rpm
Starting System Electric
Lubrication Dry sump
Carburetion 92-93 all locations Mikuni BDST38/2 38mm CV type
Carburetion 94-97 all locations Keihin CV type
Primary Reduction Ratio 67/39 (1.718)
Secondary Reduction Ratio 42/17 (2.471)
Clutch type Multiple disc , Wet
Transmission Type Constant mesh 5-speed
Gear Ratio 1st 37/13 (2.846)
Gear Ratio 2nd 37/20 (1.850)
Gear Ratio 3rd 30/21 (1.429)
Gear Ratio 4th 27/23 (1.174)
Gear Ratio 5th 28/27 (1.037)
Ignition System T.C.I. (digital)
Final Transmission Chain




Chassis

Overall Length 2170 mm
Overall Width 780 mm
Overall Height 1280 mm
Seat Height 795 mm
Wheelbase 1470 mm
Minimum Ground Clearance 160 mm
Dry Weight 198 kg
Frame Type Steel, diamond shaped
Caster Angle 25°
Trail 105 mm
Fuel Tank Capacity 20 L
Front Suspension Telescopic fork 41mm
Rear Suspension Swinging arm (monocross)
Front Wheel MT3.00 x 18, Aluminum
Front Wheel Travel 149 mm
Rear Wheel MT4.00 x 17, Aluminum
Rear Wheel Travel 140 mm
Front Brake Dual discs, 298 mm diam
Rear Brake Single disc, 245 mm diam
Front tyre 110/80 ZR18
Rear tyre 150/70 ZR17

External links

True Horsepower Reference table
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