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Everything Dirt Bike
General Dirt Bike
What octane to run?
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<blockquote data-quote="SRAD97750" data-source="post: 141986" data-attributes="member: 425"><p>Have you done a compression test?</p><p>If you are under 200PSI cranking compression in a modern 4T, you can run on 91 pump gas.</p><p>My GSXR makes 14:1 compression/14,000 RPM and runs great on pump gas.</p><p> </p><p>I suggest trying 91 from the pump. If it pings or runs funny, you can mix in race fuel at 1/5 and I promise you'll be fine. -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: 141986, member: 425"] Have you done a compression test? If you are under 200PSI cranking compression in a modern 4T, you can run on 91 pump gas. My GSXR makes 14:1 compression/14,000 RPM and runs great on pump gas. I suggest trying 91 from the pump. If it pings or runs funny, you can mix in race fuel at 1/5 and I promise you'll be fine. -BIG DAN:thumb: [/QUOTE]
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What octane to run?
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