Yamaha YZ125: review, history, specs
|Also called||YZ125X, YZ 125|
|Production||1997 - 2019|
|Class||[[:Category:Motocross motorcycles|Motocross]] [[Category:Motocross motorcycles]]|
single cylinder, two-stroke
|Bore / Stroke||54.0mm x 54.5mm|
|Torque||17.7 ft/lbs (24.0 Nm) @ 10000RPM|
|Spark Plug||NGK B10EG '76-80 , '81
NGK B9EG '74-75
NGK B9EG '82 , '84-85 , '88-98
NGK BR9EG '83 , '86-87 , '99-08
|Transmission||Gear box: 6-speed
Final Drive: chain
|Suspension||Front: kyb® speed-sensitive system inverted fork; fully adjustable
Rear: kyb® single shock; fully adjustable
|Brakes||Front: single disc. hydraulic.
Rear: single disc. hydraulic.
|Front Tire||3.00-21 '76 , '77-80 , '81 , '82
80/100-21 '86-87 , '88 , '89-93 , '94-96 , '97-98 , '99-04 , '05-08
90/90-21 '83 , '84 , '85
|Rear Tire||6675 '76 , '77-80 , '81 , '82
130/80-18 '83 , '84 , '85
100/90-19 '89-93 , '94-96 , '97-98 , '99-04 , '05-08
100/100-18 '86-87 , '88
|Wheelbase||56.81 inches (1443 mm)|
|Length||84.09 inches (2136 mm)|
|Width||32.6 inches (828 mm)|
|Height||50.98 inches (1295 mm)|
|Seat Height||38.39 inches (975 mm)|
|Weight||190.04 pounds (86.2 Kg) (dry), 93.9 kg (wet)|
|Fuel Capacity||2.11 Gallon (8.00 Liters)|
- 1 Engine
- 2 Drive
- 3 Chassis
- 4 First Generation
- 5 1979
- 6 1980 YZ125G
- 7 Third Generation
- 8 1992 YZ125
- 9 1997 - 2000 Yamaha YZ 125
- 10 2001 - 2004 Yamaha YZ 125
- 11 2005 - 2008
- 12 2009 Yamaha YZ125
- 13 2010 Yamaha YZ125
- 14 2011 Yamaha YZ125
- 15 2012 Yamaha YZ125
- 16 2013 Yamaha YZ125
- 17 2014 Yamaha YZ125
- 18 2018 Yamaha YZ125
- 19 In Media
- 20 See Also
- 21 References
The bike has a 6-speed transmission. Power was moderated via the multiplate wet clutch.
It came with a 80/100-21 front tire and a 100/90-19 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® speed-sensitive system inverted fork; fully adjustable while the rear was equipped with a kyb® single shock; fully adjustable. The YZ125 was fitted with a 2.11 Gallon (8.00 Liters) fuel tank. The bike weighed just 190.04 pounds (86.2 Kg). The wheelbase was 56.81 inches (1443 mm) long.
- SERIAL # 453-000101 - 007730
- SERIAL # 453-100101 - 101620
- SERIAL # 537-000101 - 014044
- SERIAL # 1W1-000101 - 015610
- SERIAL # 2K6-000101 - 015080
- SERIAL # 2X3-000101 - N/A
- SERIAL # 3R3-000101 - ON
Race-developed over a three year period, the YZ125H was the first liquid-cooled Yamaha motocrosser. The alloyed aluminum radiator was mounted to the top triple clamp. Coolant was channeled through the handlebar crown, steering head pipe and the down pipe of the frame. Liquid-cooling helped minimize heat-induced power loss racers experienced during a race.
1997 - 2000 Yamaha YZ 125
|Production||1997 - 2000|
|Manuals||2000 Yamaha YZ125 (M) LC Owners Service Manual
In ’96 they made some changes that lasted until the end of 2001. These are still considered some of the best motocross bikes, especially the 1999 model. They are fast, reliable, and are just a great overall bike.
2001 - 2004 Yamaha YZ 125
|Production||2001 - 2004|
|Manuals||2001 Yamaha YZ125 (N) LC Owners Service Manual
2004 Yamaha YZ125 S Owners Service Manual
In 2002 the frame changed, making it lighter, narrower, and more flick-able. However, many people didn’t approve because it switched to a 5-speed transmission. 125’s have a narrow power-band as it is, and some riders just like having that extra gear. This bike comes equipped with 124cc, two stroke, liquid-cooled engine since 1981. However, many people didn’t approve because it switched to a 5-speed transmission. 125’s have a narrow power-band as it is, and some riders just like having that extra gear.
2003 Yamaha YZ125
Small bikes can provide big fun, and the best way to test this truth is to ride the 2002 YZ125. A brawny 124cc liquid-cooled 2-stroke engine delivers more punch than you'd expect, and manual 5-speed transmission provides excellent control across then whole rpm range.
This model year received fork and swingarm revisions, structural strengthening and engine tweak including new carburetor settings for increased responsiveness. Add in lighter brakes and high-performance Excel rims for a bike that's made for winning at the track.
2004 Yamaha YZ125
Some believe that small-displacement bikes are dull, but if they took a ride aboard the 2003 Yamaha YZ125, they'd most likely change their minds in a matter of minutes. Built around a bulletproof 124cc liquid-cooled 2-stroke lump, the 2003 YZ125 is a great step toward the high-performance machines, offering a great basis for solid training ahead of the real deal.
Kayaba suspensions, top-notch disc brakes, a high-adherence seat cover, beefy 48mm forks, titanium foot pegs and many more top-drawer features are present to create the best training conditions for the future champs.
2005 - 2008
|Production||2005 - 2008|
|Manuals||2005 Yamaha YZ125 Owners Service Manual
2006 Yamaha YZ125
The 2005 YZ125 gets a lot of revisions and updates, including more tweaking for the 1-year-old all-new lump and a new silver paint job. Yamha came up with an all-new aluminum frame for the previous model year, and it has now received a new hydro-formed swingarm, new triple clamps and new adjustable handlebars.
The Kayaba forks are also new, while the rear suspension got a matching revision. Brakes have also been updated. and a Sun Star rear sprocket adds more contact area with the chain for increased grunt.
2007 Yamaha YZ125
The 2007 MY Yamaha YZ125 is laden with upgraded features and carries on the heritage of its family as a high-performance small-displacement, entry-point 2-stroke bike. Multiple parts have received improvements, from the fork tube coating and valving to the piggyback rear monocross damper with a titanium spring, the new swingarm, Taper Pro bars, and improved rear subframe.
One of the lightest competition 125cc 2-stroke machines on the market, the 2007 MY YZ125 is a natural stage in becoming a champion, and an exceptional intermediate bike before taking on the big-bore MX monsters.
2008 Yamaha YZ125
Ultra lightweight, packing more punch than meets the eye and with sharp handling, the 2008 MY YZ125 greets riders with a new aluminum frame, a very compact engine and multiple revisions in all the departments. A new intake manifold was designed for better performance, while more high-rev power is now available.
An adjustable clutch is standard, just like the aluminum cradle, triple clamps, swingarm, and the adjustable handlebar mounts. Speed-sensitive Kayaba suspensions add unprecedented precision to your riding, while the recent tweaks help for more precise cornering, too. Add in titanium pegs and a repackable exhaust for top-notch convenience.
2009 Yamaha YZ125
Welcome to the real competition world, the 2009 MY YZ125 is probably the bike you've been looking for. packing plenty of nerve with its 124cc 2-stroke liquid-cooled single, the bike provides exceptional YZ-family racer DNA with its heavy-duty clutch and 6-speed manual transmission, while the competition-grade aluminum frame uses premium adjustable Kayaba suspensions loaded with plenty of works-derived features.
Add in titanium pegs, racing-grade levers, a repackable silencer, competition seat and revised ergonomics, complemented by the new wave rotors and the updated forks.
2010 Yamaha YZ125
With the 2010 MY YZ125 things begin to get serious, as this 2-stroke machine is the initial step into the world of real racers. The bike has an aluminum frame, inverted Kyb forks, wave rotors, speed sensitive, adjustable suspensions, a heavy-duty clutch and multiple other high-performance, race-grade parts which add to the overall trim.
A premium small-displacement bike to allow young riders to get their first taste of hard-earned victory, the 2010 MY YZ125 is ready to take on the competition, right form the box.
2011 Yamaha YZ125
The 2011 MY YZ125 is a 2-stroke competition machine designed to provide premium performance straight from the box. The bike has a lightweight aluminum frame, with adjustable suspensions, a titanium rear spring and more race-derived components aimed at offering great maneuverability and explosive dirt performance.
The exhaust is also repackable from constant engine performance, while the "gripper" seat cover enhances rider contact with the bike, even in the most demanding of situations.
2012 Yamaha YZ125
The 2012 MY YZ125 is a 2-stroke entry-level dirt racing machine which packs a lot of character and will help the growing riders learn more secrets to help them get the better of their competitors. A great choice for those who are too big for the YZ85 bikes, but who are not skilled enough yet to jump aboard the bigger 4-stroke machines, the YZ125 retains all the key features of a high-performance off-road machine.
A bulletproof, high-revving engine is providing the needed nerve to tackle long straights, steep hills and tight corners alike, while the gripper seat, titanium foot pegs and the Pro taper aluminum handlebar are also stock trim for a ready-to-race status straight from the crate.
2013 Yamaha YZ125
The 2012 124cc engine of the Yamaha YZ125 offers a staggering 33HP of high-torque fun, and makes the bike suitable for both generic off-road use and fast-paced dirt racing. This bike 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 6-speed gearbox. Together with the upright, forward-slanted design, the YZ125 offers unlimited fun for off-road adventure and all the prerequisites for dirt racing at its possible max.
2014 Yamaha YZ125
The 2013 Yamaha YZ125 is a very good bike to make the transition from the small-displacement kids' motorcycles to the very serious quarter-liter machines. It sports the same effortless handling of the smaller bikes, but when it comes to punch, this machine has plenty to offer. The weight is kept under a strict watch with the introduction of an aluminum frame, and the revised bike architecture brings more mass to the center of the bike for a more stable feel and enhanced maneuverability.
Speed-sensitive KYB forks provide excellent ground copying, and the use of titanium elements reduce the weight even more. Suitable for track use, the 2013 Yamaha YZ125 is also a great companion for outdoor fun, and it will be a great choice as a recreational two-wheeler.
2018 Yamaha YZ125
The 2018 YZ125 is ready to race out of the crate, complete with an aluminum handlebar, titanium foot pegs and gripper seat. The YZ125 is ready to race out of the crate, complete with an aluminum handlebar, 2-position adjustable handlebar clamp, wide foot pegs, gripper seat and adjustable clutch lever with works-style cable adjuster.
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