Yamaha DT explained

Yamaha DT-1
Aka:Yamaha Trail 250
Manufacturer:Yamaha Motor Company
Parent Company:Yamaha Corporation
Production:1968—1985
Assembly:Iwata, Shizuoka, Japan
Successor:Yamaha DT250, DT360A, DT400B
Class:Trail bike
Engine:246cm3 2-stroke, single-cylinder, air-cooled
Bore Stroke:70mm64mm
Power:18.5PS at 6000 rpm
Ignition:Magnet ignition
Transmission:Manual 5-speed
Frame:Duplex cradle
Suspension:F: Telescopic, R: Swing arm
Brakes:F: Cable-operated drum
R: Rod-operated drum
Tires:F: 3.25-19, R: 4.00-18
Wheelbase:1360mm
Length:2060mm
Width:890mm
Height:1130mm
Dry Weight:123kg (271lb)
Fuel Capacity:9.5L
Fuel Consumption:40km/L
at 40km/h

The Yamaha DT is a series of motorcycles and mopeds produced by the Yamaha Motor Corporation. Models in the DT series feature an engine displacement of 50to. The first DT model, the DT-1, was released in 1968 and quickly sold through its initial 12,000 production run.[1] [2]

The DT series was created by Yamaha in the late 1960s when the United States motorcycle market was down. Market research by Yamaha indicated that, despite slow motorcycle sales, there was a largely untapped market for off-road motorcycles. At the time, only a few specialty European manufacturers such as Bultaco and Husqvarna made motorcycles specifically for off-road use. Instead, many owners purchased road motorcycles and modified them for off-road use, typically by raising the muffler, adding braced handlebars, and fitting a bash plate under the engine . Such modifications were commonly known as creating scramblers. The first DT model, the DT-1 trail bike, was released in 1968 and quickly sold out.[3]

DT-1

With the introduction of the DT-1, Yamaha essentially defined a new market for motorcycles.[4] A Dual-sport motorcycle built for off-road riding, the light and slim DT-1 was equipped with block-pattern tires and had sufficient ground clearance. Its design put it at the cutting edge of off-road bikes at that time. It had a 250 cc, single-cylinder, 5-port engine based on a motocross design, and Ceriani-type front suspension.[5]

The Society of Automotive Engineers of Japan, included the 1968 Yamaha Trail 250 (aka DT-1) as one of their 240 Landmarks of Japanese Automotive Technology.[5]

A monoshock rear suspension system was introduced starting in 1977 giving rise to the "MX" suffix on model numbers.[6]

Models in the DT series

Notes and References

  1. Web site: Yamaha DT-1. Motorcycle Classics. 2009-08-07. May–June 2008. Sean Ross.
  2. News: Salvadori. Clement. Retrospective: Yamaha DT400 Enduro: 1975 - 1979. 11 August 2013. Rider Magazine. February 2010. The DT1 was a superb motorcycle right off the drawing board, as its two-stroke, piston-port single with five ports provided the good lowend grunt that play-bikers wanted..
  3. Web site: Paving the Road to Yamaha Motor Corporation, USA. Yamaha Founding History. Yamaha Motor Corporation, U.S.A.. 10 August 2013. The world's first true off-road motorcycle debuted in 1968 to create an entirely new genre we know today as trail bikes..
  4. Motorcycle Classics, "1968 Yamaha DT-1."
  5. Web site: Yamaha Trail 250. 240 Landmarks of the Japanese Automotive Industry. Society of Automotive Engineers of Japan, Inc.. 10 August 2013. Yamaha's first no-compromize [sic] off-road model..
  6. Book: Darlington, Mansur. Yamaha trail bikes owners workshop manual. 1983. Haynes Pub. Group. 978-0-85696-519-7. Sparkford, Eng.. 13648505.