Question about 2004 Yamaha YZ 125
2000 yz125 keeps on fouling out plugs just had carb reworked.runs good for about 5 min or so then you have to putin a pulg.
Fouled plugs are typically caused by jetting that is too rich. This could also be from a dirty air filter which can make the bike run rich. Clean up your filter and see if that is it. If the filter is not too bad, you might want to drop a size on your pilot or main.
Another possibility is poor compression - this can make a 2-stroke run richer than normal as the fuel can not be burned properly. Rings don't last long in these 125s. I used to re-ring each week when I was racing 125s.
You might want to run a B8ES plug, too - this is one step hotter and will help the plug from fouling as often.
Posted on Feb 01, 2010
Open that **** up u cant putts around on a two stroke or if ur not i might have a fresh top end in it
Posted on Dec 12, 2011
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Posted on Jan 02, 2017
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