Question about 2004 Yamaha YZ 250 F

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98 YZ 250 started sputtering at higher rpms?

Now the bike stoped running and has no spark. Is it maybe cdi, or magneto?

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Just change the plug buddy use a br8eg and get back to me if still not starting

Posted on Sep 28, 2009

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1 Answer

I have a yz250 1999. and the cdi box is bad i want to buy a cdi from yz 250 2003 and i dont know is working on my bike?


Its not supposed to work on your bike "BUT" I have a 2006 raptor 660 CDI on my 02 warrior 350 and it works better than stock and is supposedly "non-compatible" with the warrior the only thing different with your bike and the 03 is the TPS

Jun 08, 2014 | 2003 Yamaha YZ 250

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Why02 yz 250 won't kick or pop start runs while pulling it but dies as it stop rolling?


Hi, Anonymous you may have a faulty cdi or charging coil issue 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.
Dirt Rider Magazine
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YAMAHA YZ250 LC Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

May 16, 2014 | 2003 Yamaha YZ 250

1 Answer

Kx 125 problems


it runs but sputters.
that can be 2 things.
First idd your sparkplug cap has had it (get a new 1 from the parts store)
2nd it could be that your getting to much fuel in top end of your revband.
easy to check just run your bike a few min with a new sparkplug and look at the color.
Wite is not enough fuel.
Brown is perfect mix.
black is to much oil and if black and wet its to much fuel.
try this test and maybe you'll find it

Apr 01, 2013 | 2003 kawasaki KX 125

2 Answers

99 yz 125 bog at high rpms


most likly needs new rings-or bad plug if you are lucky

Apr 28, 2012 | Yamaha Motorcycles

3 Answers

My Rm 250 wont spark need to know the volts from stator to cdi plug. Got brand new cdi, stator , rotor and pick up coil but it still wont spark.


The Voltage From The Stator To The CDI Should Be Around 40 Volts(AC) At Cranking Speed. Be Sure Your Meter Is Set For (AC) Not (DC). The CDI Changes The (AC) Input Voltage To (DC) Output Voltage To The Primary Terminal At The Coil. An Electrical Shock Hazard Exist If Stator Voltage Is Checked With Engine Running. Always Perform This Test At Cranking Speed (R.P.M.) For SAFETY. 120 Volts (AC) Can Be Present With Engine Running.

May 22, 2011 | 2003 Suzuki RM 250

1 Answer

My bike is running fine but if i give it gas it sputters and dies. any ideas?


Gap or replace the spark plug. Two cycle engines eat plugs. If that does not fix it replace the spark plug wire.

Mar 19, 2010 | 2004 Yamaha YZ 250 F

1 Answer

Spark pulg cap


hi,simple fix,simply screw the cap back onto the lead (right hand turn)until the cap is back on tight,there is a reverse screw inside the cap which threads its way into the lead as screw it back on,,hope this helps

Jul 06, 2009 | 2004 Yamaha YZ 250 F

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