The Yamaha YZ250F is a
motocross
Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom.
History
Motocross first evolved in Britain from motorcycle trials competi ...
motorcycle first released in 2001 by
Yamaha Yamaha may refer to:
* Yamaha Corporation, a Japanese company with a wide range of products and services, established in 1887. The company is the largest shareholder of Yamaha Motor Company (below).
** Yamaha Music Foundation, an organization estab ...
. It had a five-valve,
DOHC
An overhead camshaft (OHC) engine is a piston engine where the camshaft is located in the cylinder head above the combustion chamber. This contrasts with earlier overhead valve engines (OHV), where the camshaft is located below the combustion c ...
,
four-stroke engine
A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...
and initially had a steel frame and an aluminum subframe, which was replaced in the 2006 model with an all-aluminum frame.
This combination leads to the YZ250F being praised for combining the broad-power characteristics of a four-stroke engine with the light handling more common in smaller, 125 cc
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a Thermodynamic power cycle, power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being comple ...
motorcycles.
[Dirck Edge,]
2001 Yamaha YZ250F: MD Ride Review
, MotorcycleDaily.com, retrieve March, 2007
Significant advances
See also
*
Yamaha YZ250
The Yamaha YZ250 is a two-stroke motocross race bike made by Yamaha. The model was launched in 1974 and has been regularly updated and is still in production with new releases every year.
Engine
The original YZ250 of 1974 used an air-cooled 250cc ...
*
Yamaha YZ125
The Yamaha YZ125 is a motocross racing motorcycle with a Two-stroke engine, two-stroke Engine displacement, displacement single-cylinder engine made by Yamaha Motor Company, Yamaha since 1974. It is available to the public. For the first two years ...
*
Yamaha YZ450F
The Yamaha YZ450F is a four-stroke racing motocross bike built by Yamaha Motor Corporation. It was the successor to the previous YZ426F which was discontinued in 2003. It is credited by '' Cycle World'' and ''Dirt Rider'' magazines as the bike th ...
*
Kawasaki KX100
The Kawasaki KX100 is a two-stroke motorcycle made by Kawasaki, positioned between the 85 cc and the 125 cc classes, with 19 inch front and 16 inch rear wheels, compared to 17-inch/16-inch typical of the 85 cc motocross ...
*
Yamaha YZ85
References
2007 Yamaha YZ250F Specifications
YZ250F
Off-road motorcycles
Motorcycles introduced in 2001
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