Yamaha YZ250: review, history, specs

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1980-Yamaha-YZ250G-Yellow-3565-5.jpg
'Yamaha YZ250'
Manufacturer
[[Yamaha]]
Also called YZ250FSE - Special Edition, YZ250F 60th Anniversay, YZ250X, YZ250FX, YZ250F, YZ 250 F, YZ 250
Production 1974 - 2019
Class [[:Category:Motocross motorcycles|Motocross]] [[Category:Motocross motorcycles]]
Engine
single cylinder, two-stroke
Horsepower 48.8 hp
Torque 32 ft/lbs
Ignition cdi
Spark Plug NGK BR8EIX '98-06
NGK BR8EG '83 , '96-97
NGK B9EV '74-81
NGK B9EG '82 , '84-87
NGK B8EG '88-95
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: multiplate wet clutch
Suspension Front: kyb® spring-type fork with speed sensitive damping; fully adjustable
Rear: kyb® single shock; full adjustable
Brakes Front: single disc. hydraulic.
Rear: single disc. hydraulic.
Front Tire 3.00-21 '74-75 , '76 , '77-79 , '80 , '81 , '82
90/90-21 '83 , '84 , '85-86 , '87
80/100-21 '88 , '89-93 , '94-95 , '96-97 , '98-02 , '03-06
Rear Tire 100/90-19 '89-93
110/100-18 '87 , '88
110/90-19 '94-95 , '96-97 , '98-02 , '03-06
140/80-18 '83
4.60-18 '76
4.00-18 '74-75
130/80-18 '84 , '85-86
4.50-18 '77-79
6705 '80 , '81 , '82
Wheelbase 57.72 inches (1466 mm)
Length 85.2 inches (2164 mm)
Width 32.52 inches (826 mm)
Height 50.39 inches (1280 mm)
Seat Height 37.99 inches (965 mm)
Weight 212.08 pounds (96.2 Kg) (dry), 112.9 kg (wet)
Oil Capacity 0.4 Gallon (1.50 Liters)
Fuel Capacity 2.0 Gallon (7.57 Liters)
Related Yamaha YZ50
Yamaha YZ60
Yamaha YZ80
Yamaha YZ85
Yamaha YZ100
Yamaha YZ125
Yamaha YZ250
Yamaha YZ400
Yamaha YZ465
Yamaha YZ490
Competition Honda CR250R
Kawasaki KX250
Suzuki RM250
Manuals Service Manual



The Yamaha YZ250 was a single cylinder, two-stroke motocross motorcycle produced by Yamaha between 1974 and 2019. It is one of the last two-stroke 250cc bikes still in production. Yamaha produces a four-stroke version made to compete with this version in the YZ400F/YZ426F/YZ450F. The similarly named Yamaha YZ250F is intended to compete with the Yamaha YZ125.

History

Yamaha created the very first single-shock, production motocross bike ever. This was the beginning of the Yamaha Monocross machines that changed motocross forever. The YZs of this time were near replicas of "Works Bikes" with their aluminum fuel tanks and light weight, lacking only magnesium engine cases and a few titanium pieces.


Engine

The engine was a liquid cooled single cylinder, two-stroke.

Drive

The bike has a 6-speed transmission. Power was moderated via the multiplate wet clutch.

Chassis

It came with a 90/90-21 front tire and a 110/100-18 rear tire. Stopping was achieved via single disc. hydraulic. in the front and a single disc. hydraulic. in the rear. The front suspension was a kyb® spring-type fork with speed sensitive damping; fully adjustable while the rear was equipped with a kyb® single shock; full adjustable. The YZ250FX was fitted with a 2.0 Gallon (7.57 Liters) fuel tank. The bike weighed just 212.08 pounds (96.2 Kg). The wheelbase was 57.72 inches (1466 mm) long.

First Generation

1974 YZ250A



In 1972 Hakan Anderson took a YZ250A to the world motocross championship (and finished second to Joel Robert on his RH72 Suzuki).

  • SERIAL # 431-000101 - 004104

1975


  • SERIAL # 483-000101 - 002759

1976

1976 Yamaha YZ250C in Yellow


  • SERIAL # 509-100101 - 103405

1977

  • SERIAL # 1W3-000101 - 006520

Second Generation

1978 YZ250


  • SERIAL # 2K7-000101 - 009850

1979 YZ250F

This model is technically a YZ250F by its letter designation but in this model's case the F signifies the year, not that it is a four-stroke.


  • SERIAL # 2X4-000101 - N/A

1980 YZ250G


  • SERIAL # 3R4-000101 - ON

1981 YZ250H


Third Generation

1986-Yamaha-YZ250-White-0.jpg
'Yamaha YZ250 LC'
Manufacturer
[[Yamaha]]
Production 1986 - 1993
Class [[:Category:Motocross motorcycles|Motocross]] [[Category:Motocross motorcycles]]
Engine
249cc liquid-cooled single cylinder, two-stroke
Bore / Stroke 68 x 68.8 mm
Compression ratio 9.0 ~ 10.8 : 1
Horsepower 48.8 hp
Torque 32 ft/lbs
Ignition cdi
Spark Plug NGK BR8EG [1]
Transmission Gear box: 5-speed
Clutch: multiplate wet clutch
Final Drive Chain: 520x115 [1]
Suspension Front: kyb® spring-type fork with speed sensitive damping; fully adjustable
Rear: kyb® single shock; full adjustable
Brakes Front: single disc. hydraulic.
Rear: single disc. hydraulic.
Front Tire 90/90-21 '83-87
80/100-21 '88-06
Rear Tire 100/90-19 '89-93
110/100-18 '87-88
130/80-18 '84 , '85-86
Wheelbase 57.72 inches (1466 mm)
Length 85.2 inches (2164 mm)
Width 32.52 inches (826 mm)
Height 50.39 inches (1280 mm)
Seat Height 37.99 inches (965 mm)
Weight 104 Kg (229.3 lb) (wet)
Oil Capacity 0.75 L [1]
Recommended Oil Yamahalube 10W-30
Fuel Capacity 7.7 L (2.03 US gal) [1]
Competition Honda CR250R
Kawasaki KX250
Suzuki RM250
Manuals 1994 Yamaha YZ250 F LC Owners Service Manual
More Manuals

The YZ250 was now liquid-cooled sometimes referred to as YZ250 LC.

1982

Came with YPVS Power Valve

1986


1990

  • Red fork legs

1991

  • new shape sidepanels and rear fender

1992

  • new front fender

1993

1993 Yamaha YZ250 E LC Owners service manual

Generation (1993 - 1995)

1993

  • new plastic design last year using pink, brown/black coating on forks

1994

  • purple seat and frame

1995

  • rear disc cover


Generation (1996 - 2001)

Yamahayz2501996.jpg
Yamaha YZ250
Production 1996 - 2001
Weight
Manuals 1998 Yamaha YZ250 KLC Owners Service Manual

2000 Yamaha YZ250 M LC Owners Service Manual

2001 Yamaha YZ250 (N) LC Owners Service Manual
More Manuals
  • 1996 - 1998 redesign and dark blue plastics
  • 1999 - up engine redesign, brighter blue plastics but same design
  • 2000 - air box white & new front fender
  • 2001 - seat cover got black top

Generation (2002 - 2004)

Yamaha-yz250-2003-2003-0 lKQcu8V.jpg
'Yamaha YZ250'
Production 2002 -2004
Weight
Manuals 2002 Yamaha YZ250 (P) LC Owners Service Manual

2003 Yamaha YZ250 R LC Owners Service Manual

2004 Yamaha YZ250 S Owners Service Manual
More Manuals


2002

  • 2002 - redesign with frame, swingarm and plastics changed and new kickstarter

2003 Yamaha YZ250

2003 Yamaha YZ250

There's no F after the 2002 YZ250 so we're dealing with 2-stroke might, this time. This model year received a lot of improvements, starting with a new, lighter and tougher swingarm and recalibrated suspensions, with more precise travel and providing even more control.

In the engine department, the 2002 Yamaha YZ250 comes with a new cylinder head and combustion chamber, a reshaped exhaust port, and a revised second gear for explosive power deployment. The factory-spec racing clutch lever is adjustable, and the rear master cylinder and discs are also revamped.

2004 Yamaha YZ250

2004 Yamaha YZ250

With around 40 years of YZ250 history, it was natural that the 2003 iteration carried on the acclaimed nerve and maneuverability, in a package with received multiple updates for even higher performance and more durability. The forks went up to 48mm and received a new coating for smoother action, and titanium pegs shaved off some more weight.

The 2003 YZ250 receives a new gripper-style seat cover, revised engine internals for a better mid-range power deployment, and an adjustable clutch lever for quick, on-the-fly fine tuning.

Generation (2005 - )

Yamaha-yz250-2006-2006-2.jpg
'Yamaha YZ250'
Production 2005 -
Weight
Manuals 2005 Yamaha YZ250 Owners Service Manual

2006 Yamaha YZ250 V Owners Service Manual
2007 Yamaha YZ250 W Owners Service Manual
2015 Yamaha YZ250 Owners Service Manual

2019 Yamaha YZ250 Owners Service Manual
More Manuals
'Yamaha YZ250'
Production 2005 -
Weight
Manuals 2005 Yamaha YZ250 Owners Service Manual

2006 Yamaha YZ250 V Owners Service Manual
2007 Yamaha YZ250 W Owners Service Manual
2015 Yamaha YZ250 Owners Service Manual

2019 Yamaha YZ250 Owners Service Manual
More Manuals

The main feature of this generation was the switch to an aluminum frame.

2006 Yamaha YZ250

Having received an all-new aluminum frame one year before, the 2005 YZ250 got a little more motocross edge thanks to some more tweaking and a new, hydro-formed swingarm. The 48mm fork has also been revised, while the rear suspension got a top-drawer titanium spring, too.

The trim of the 2005 YZ250 includes multiple works-style parts and technologies to allow riders to benefit from the best bang their money can buy. Save for the engine, which is a 2-stroke, the frame is almost identical to that of the 4-stroke machines.

2007 Yamaha YZ250

The 2007 MY Yamaha YZ250 got a little more power from its 249cc reed-inducted single, with multiple revisions providing better performance for a lot of components, such as the cylinder, power valve system and carburetor. Quick-access clutch and washable air filter make maintenance easier, reducing the time you'll spend in the garage.

The competition-grade MX aluminum frame keeps the bike light and handling precise, while the speed-sensitive fork adds premium damping and compression characteristics to the ride. Add in Excel rims, Sun Star sprockets, Pro Taper bars and more top-drawer parts to get you past the finish line first.


2008 Yamaha YZ250

The 2008 MY YZ250 is the perfect choice of you want to show someone how evil can a quarter-liter 2-stroke machine can be. The machine is infused with the best features of its 4-stroke siblings, and loaded with works-derived technologies, such as a titanium rear shock spring, aluminum frame, a new front rotor and twin piston caliper, Pro taper bars, an adjustable 48mm fork, quick-adjust clutch lever and a redesigned brake lever, as well.

The biggest 2-stroke off-road machine has just gotten better, and this calls for some hard riding, showing your friends who's the boss of the dirt track.

2009 Yamaha YZ250

Only those who have ridden a 2-stroke quarter liter off-road machine know the adrenaline rush the amazing power and torque combined with a light weight brings... the rest are about to find out. If real-life racing sensations are one of the things you're looking for, then throwing a leg over the 2009 MY YZ250 is the natural thing to do.

The bike's seat was revised for better support and freedom of movement, while other components have been updated, with lower weight and enhanced performance. The bike also got a new anodized chain for this MY, but new wave rotors in the front and rear are also on the menu, as well as a new, re-valved fork.


2010 Yamaha YZ250

A 2-sstroke quarter-liter machine like the 2010 MY YZ250 is a true weapon in the hands of a skilled rider. The engine delivers explosive power as the throttle is twisted and the brawn of this lightweight machine can strike fear in the minds of the faint-hearted. The aluminum frame uses inverted Kayaba forks and a works-derived rear suspension, both adjustable and capable to deliver first-class performance to the discerning rider.

Little has been improved over the previous edition, as it looks like Yamaha's current recipe is a successful one.


2011 Yamaha YZ250

The 2011 YZ250 is a competition quarter-liter 2-stroke bike intended for use by well-trained riders. This motorcycle was loaded with premium components derived from the factory racing programs, and is capable to deliver top performance in the hands of a skilled rider. The YZ250 arrives ready to race from the box, equipped with Excel rims, a lightweight aluminum frame, top-drawer adjustable Kayaba suspensions, a titanium rear shock spring, racing-grade sprockets, a repackable silencer and jumbo-sized folding, serrated pegs and foot controls.


2012 Yamaha YZ250

2012 Yamaha YZ250 2012 Yamaha YZ250 2012 Yamaha YZ250 2012 Yamaha YZ250 2012 Yamaha YZ250

This 2-stroke bike sports an aluminum frame and a smooth close-gear 5-speed gearbox. Together with the upright, forward-slanted design, the YZ250 offers unlimited fun for off-road adventure and all the prerequisites for dirt racing at its possible max.

The 2012 MY Yamaha YZ250 is ready to race out of the crate, complete with a ProTaper aluminum handlebar, titanium foot pegs, gripper seat, and Excel rims. Its lightweight build means extremely easy handling, excellent cornering and less fatigue, granting the rider more possibilities to focus on his capabilities, instead of “fighting” the machine.



2013 Yamaha YZ250

2013 Yamaha YZ250 2013 Yamaha YZ250 2013 Yamaha YZ250 2013 Yamaha YZ250 2013 Yamaha YZ250

The 2012 Yamaha YZ250 is ready to race out of the crate, complete with an aluminum handlebar, titanium foot pegs, gripper seat, and Excel rims. Its lightweight build means extremely easy handling, excellent cornering and less fatigue, granting the rider more possibilities to focus on his capabilities, instead of “fighting” the machine.

This 2-stroke bike sports an aluminum frame and a smooth close-gear 5-speed gearbox. Together with the upright, forward-slanted design, the YZ250 offers unlimited fun for off-road adventure and all the prerequisites for dirt racing at its possible max.


2014 Yamaha YZ250

The 2013 Yamaha YZ250 carries on the heritage of the bike which won the first-ever World Motocross Championship back in 1973. It retains the 2-stroke principle but the rest of the bike is completely changed, now benefiting from the most advanced technology in the field of MX racing. The chassis is now made in aluminum and rolls with light, cast alloy wheels, USD forks and a Power Valve System for the modern exhaust.

The handling is simply flawless, given the revised suspension settings and chassis sturdiness, while the seat ergonomics have been also updated for good support and maximum freedom of movement.


2016 Yamaha YZ250X

2016 Yamaha YZ250X 2016 Yamaha YZ250X 2016 Yamaha YZ250X 2016 Yamaha YZ250X 2016 Yamaha YZ250X

Legendary YZ250 249cc liquid-cooled reed-valve-inducted two-stroke engine, a new compression ratio, new exhaust port timing, updated Yamaha Power Valve System (YPVS) timing, and a new model-specific CDI unit – all focused on making a wide, controllable power character ideal for cross-country racing.


2017 Yamaha YZ250

2017 Yamaha YZ250 2017 Yamaha YZ250 2017 Yamaha YZ250 2017 Yamaha YZ250

The YZ250 with the same engine 250cc liquid-cooled reed-valve-inducted two-stroke engine is lightweight, compact and features an incredibly wide, hard-hitting powerband. New 270mm front disc brake (up from 250mm) also features a new brake pad material for exceptional stopping power and control for aggressive corner entries.

In Movies

See Also


References