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Everything Dirt Bike
Make / Model Specific
Yamaha
Gas ratio
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<blockquote data-quote="SRAD97750" data-source="post: 187893" data-attributes="member: 425"><p>That is a dangerous assumption.</p><p>Making the Oil/Fuel Mixture "Richer," inversely brings the Air/Fuel Mixture "Leaner."</p><p>Lean Air/Fuel mixture is the dangerous one.</p><p></p><p>I would run 56:1 if that's what the previous owner has been running. Take a look at the next top end to see how it looks.</p><p></p><p>You need to adjust jetting to change Oil/Fuel mixture.</p><p>This will require tuning, multiple plug chops, and being certain you have maintained a stoichometric Air/Fuel mixture after changing the oil/fuel mixture. -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: 187893, member: 425"] That is a dangerous assumption. Making the Oil/Fuel Mixture "Richer," inversely brings the Air/Fuel Mixture "Leaner." Lean Air/Fuel mixture is the dangerous one. I would run 56:1 if that's what the previous owner has been running. Take a look at the next top end to see how it looks. You need to adjust jetting to change Oil/Fuel mixture. This will require tuning, multiple plug chops, and being certain you have maintained a stoichometric Air/Fuel mixture after changing the oil/fuel mixture. -BIG DAN:thumb: [/QUOTE]
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Everything Dirt Bike
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Gas ratio
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