Question about 2003 Yamaha YZ 125

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I went to start my 2001 yz125 an on about the third kick the kick start locked up. i took it apart an tried it again still the same thing have you seen this before an if so could u tell me what it mite be

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Hi, Todd 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.
Won start Kick start won even go down it like it stuck Banshee Repairs and...
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YAMAHA YZ125 Owner Service Manual
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Posted on Jul 16, 2016


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Posted on Jan 02, 2017

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SOURCE: yz125 spark plug problem

What does removed plug look like??

Is the plug correct for this bike, very important.

Posted on Jan 03, 2010

  • 4 Answers

SOURCE: How to set my points on My 1985 yamaha yz125 wont

take your flywheel off then turn youe engine over while you watch the crank spin when the lobe on the crank moves the points to the hihest spot thats the point where you set them i think its like 10 or 12 mm

Posted on May 29, 2012

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My kick starter just locked up

1). Confirm that the transmission is really in nuetral, or insure that the clutch is pulled in.

2). Have you tried removing the spark plug to insure that you do not have a hydraulic lock due to excess fuel in the cylinder? With spark plug removed, any excess fuel should be expelled out the open spark plug hole. CAUTION: INSURE THAT THE SPARK PLUG LEAD IS DISCONNECTED, AND HELD AWAY FROM THE OPEN CYLINDER TO PREVENT ACCIDENTAL IGNITION OF EXCESS FUEL.

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Sounds like it could be as simple as a fouled plug. Change the spark plug and try it again. Lugging a 125 around fouls plugs really easily, you have to open it up and clean it out occasionally.

Jul 24, 2010 | 2003 Yamaha YZ 125

1 Answer

Yz125 spark plug problem

What does removed plug look like??

Is the plug correct for this bike, very important.

Jan 03, 2010 | 2003 Yamaha YZ 125

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Sorry to tell you.The motor seized and needs a rebuild.Not to many other options.You gave a very good description of what happened.Hope this helps

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If the transmission was recently changed it should be covered under some form of warranty and they should fix it for free.

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First push the last two buttons on the right on the keypad and see if that locks all locks. If it does not then it sound like there is an intermittent transmitter switch that has gone out, Have a friend engage - disengage until you locate the sound you describe and locate that switch, Pull it and take it to the dealership. Replace it and you should be back in business.

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I have a yamaha yz125 94 i have a problem with the timing there is a good spark i have tryed turning the inside stator but isnt getting the spark at the right time i have redone piston, mains because it...

The timing isn't adjustable on these models. The yz125 is very simple, everything bolts into place, and anything that is adjustable has huge alignment marks. Generally when this happens, something in the stator assembly has failed or malfunctioned, so you will have to narrow it down and replace it.

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