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Everything Dirt Bike
General Dirt Bike
Fouling Plugs
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<blockquote data-quote="SRAD97750" data-source="post: 175049" data-attributes="member: 425"><p>The carburetor is too rich for your altitude/temperature. Your AIR/FUEL mix is too rich.</p><p>Which is not the same as the premixed oil ratio. In fact leaning your OIL/FUEL ratio actually RICHENS your AIR/FUEL ratio.</p><p>Brass jets become worn over time which makes them richer and richer as time goes on. You either need to replace the worn jets or install smaller jets if the stock ones are new.</p><p></p><p>Whatever you do, pick a oil mix ratio and stick with it. Changing premix ratios is very dangerous and leads you in circles when trying to diagnose a fueling issue.</p><p>-BIG DAN<img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif" class="smilie" loading="lazy" alt=":thumb:" title="Thumb :thumb:" data-shortname=":thumb:" /></p></blockquote><p></p>
[QUOTE="SRAD97750, post: 175049, member: 425"] The carburetor is too rich for your altitude/temperature. Your AIR/FUEL mix is too rich. Which is not the same as the premixed oil ratio. In fact leaning your OIL/FUEL ratio actually RICHENS your AIR/FUEL ratio. Brass jets become worn over time which makes them richer and richer as time goes on. You either need to replace the worn jets or install smaller jets if the stock ones are new. Whatever you do, pick a oil mix ratio and stick with it. Changing premix ratios is very dangerous and leads you in circles when trying to diagnose a fueling issue. -BIG DAN:thumb: [/QUOTE]
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