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Everything Dirt Bike
General Dirt Bike
Cool article in dirt bike magazine
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<blockquote data-quote="jackson409" data-source="post: 60134" data-attributes="member: 381"><p>Ok, so I am not much on these 4jokes. So what is the deal with the expansion chamber on the exhaust. I know why two strokes have them. They serve a purpose but there shouldn't be any unburnt fuel going out the exhaust on these bikes do the 4 strokes having a intake and exhaust valve system. Are they just trying to look cool like a 2st <img src="https://www.dirtbikeaddicts.com/static/images/smilies/smirk.gif" class="smilie" loading="lazy" alt=":smirk:" title="Smirk :smirk:" data-shortname=":smirk:" /></p><p> </p><p>nah really why? <img src="https://www.dirtbikeaddicts.com/static/images/smilies/noidea.gif" class="smilie" loading="lazy" alt=":noidea:" title="Noidea :noidea:" data-shortname=":noidea:" /></p></blockquote><p></p>
[QUOTE="jackson409, post: 60134, member: 381"] Ok, so I am not much on these 4jokes. So what is the deal with the expansion chamber on the exhaust. I know why two strokes have them. They serve a purpose but there shouldn't be any unburnt fuel going out the exhaust on these bikes do the 4 strokes having a intake and exhaust valve system. Are they just trying to look cool like a 2st :smirk: nah really why? :noidea: [/QUOTE]
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Everything Dirt Bike
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Cool article in dirt bike magazine
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