Question about 2003 Yamaha YZ 125

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Carb adjustments for 2002 yamaha yz 125 - 2003 Yamaha YZ 125

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Hi, Billywill946 for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yamaha yz125 carb adjustments
how to adjust yamaha yz125 carb
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
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Posted on Jul 19, 2016

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Posted on Jan 02, 2017

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SOURCE: yamaha yz 125 1994

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Can I get a “very helpful” rating on this answer? Thanks!

Posted on Jul 06, 2009

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SOURCE: how do i decode yamaha yz 125 engin id number

You don't decode it. It is only a production run series number. Mororcycles are like cars in that respect. It is the frame number, AKA the "VIN number", is what carries all the information. Call a dealer with the frame number and he can tell you year, paint color, specific model and more. They may have a problem if the bike is too old. Yamaha changed to a newer code system a few years back.
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Posted on Aug 28, 2009

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SOURCE: yz 125 water pump seal

GET A SMALL SCREW DIVER IN BETWEEN THE SHAFT AND SEAL PRY IT OUT WITH OUT DAMAGING THE SHAFT THEN USE A SOCKET FROM A TOOL KIT THAT FITS PERFECTLY AROUND THE EDGE OF THE NEW SEAL TO HAMMER IT BACK IN

Posted on Aug 31, 2009

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SOURCE: whats the tyre pressure for a yamaha yz 125 2006

ALL TIRE PRESSURE REQUIREMENTS ARE LABELED ON THE SIDE OF THE TIRE

Posted on Sep 18, 2009

wayneman01
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SOURCE: my yamaha yz 125 is dumping to much fuel and

There are only two adjustments to make on your carburetor; the idle speed, and the idle mixture adjustment. If the spark plug fouls frequently, first make sure you are using the correct spark plug. Your 1997 YZ125 uses an NGKB9EGV. Then be sure you are using the recommended two stroke oil, mixed to the proper ratio, in the fuel. Also make sure the air filter is not excessively soiled.
With all of the above confirmed and corrected, start the bike and run until the engine is up to normal temperature. Adjust the idle mixture screw to attain the fastest idle and best throttle response. Then adjust the idle speed.
If you are still fouling the spark plug, verify that the carburetor has the correct size jets by consulting your owner's manual. Keep in mind that if you are operating your bike at an altitude higher than about 6,000 feet above sea level, the stock jetting may be too rich. Down-size the main jet in small increments until satisfactory operation and the correct spark plug color is obtained.

Posted on Nov 02, 2009

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1 Answer

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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Mar 24, 2012 | Yamaha YZ 125 Motorcycles

1 Answer

I have a 1993 yz 125 I have a carburetor that is acting a little funny I rebuild everything on the bike it just takes off a little slow or boggy. How should I adjust the air fuel mixture to make my...


Hi, Judahjbirch for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Mar 18, 2012 | 2003 Yamaha YZ 125

1 Answer

Carb what is the setting on air fuel mix


Hi, Travis for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Oct 03, 2011 | 2003 Yamaha YZ 125

1 Answer

2004 YZ 125. Carb slide is broken where can i get a second hand carb or slide


Hi, Stweazel you may want to look on eBay and for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Sep 05, 2011 | 2004 Yamaha YZ 125

1 Answer

Bike revs uncotrollaby. 125 yz 2002


Is the throtle cable stuck? if not look at a good carb clean, it could have enough gas to start but be too lean that would make it rev up. Two stokes also do this right before they run out of gas

Jun 08, 2011 | 2003 Yamaha YZ 125

1 Answer

I have a 2002 yz 125 and i just recently had it rebuilt both top and bottom end. it was running fine a couple rides then all of a sudden it started to act up when i would take it up to high end and it...


Sounds like it is running out of fuel adjust float in carb. Possible electrical connection problem with spark from coil check all wiring make sure pet **** has flow constantly of fuel.

Oct 10, 2010 | 2003 Yamaha YZ 125

2 Answers

My yamaha yz 125


if your getting spark than i would take the carb off and clean it you could have a cloged jet.( just because your getting fuel from tank to carb dont mean its getting from carb to jug) i would try that first......yz-maniac.

May 14, 2010 | 2004 Yamaha YZ 125

1 Answer

Should a 2 stroke tick over?


you just need to adjust your carb mixture screws located on the side of the carb this will adjust your tickover revs.hope this helps

May 10, 2009 | 2003 Yamaha YZ 125

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