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Everything Dirt Bike
General Dirt Bike
Extra vent between the reeds and piston on yz 250??
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<blockquote data-quote="SRAD97750" data-source="post: 161845" data-attributes="member: 425"><p>I have never seen that before and it is definitely not stock for a single cylinder 2 stroke.</p><p>I would cap it.</p><p></p><p>On my sportbikes though, every cylinder has one of those.</p><p>They are for balancing multiple carbs or, YES... NITROUS PORTS.</p><p>With NOS there are two ports at the top of the intake, one for fuel, the other for Nitrous. -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: 161845, member: 425"] I have never seen that before and it is definitely not stock for a single cylinder 2 stroke. I would cap it. On my sportbikes though, every cylinder has one of those. They are for balancing multiple carbs or, YES... NITROUS PORTS. With NOS there are two ports at the top of the intake, one for fuel, the other for Nitrous. -BIG DAN:thumb: [/QUOTE]
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Everything Dirt Bike
General Dirt Bike
Extra vent between the reeds and piston on yz 250??
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