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Message: <blockquote data-quote="bobkyle2" data-source="post: 33022" data-attributes="member: 579">ya thats what i hear <img src="https://www.dirtbikeaddicts.com/static/images/smilies/wink.gif"  class="smilie" loading="lazy" alt=":wink:" title="Wink    :wink:" data-shortname=":wink:" />... i dont know anything about jetting bikes...i know racing mud trucks.. you can really adjust on the fly... but these carbs have not too much adjustability.. ive got another question My throttle piston ...on the backside(pointing toward filter) the piston has some scoring... but the carb did not... what caused this... do i need to replace it...... its not really bad if i recall... but i seen in the manual to replace it if it is scored... i didnt know if this something i need to do also??</blockquote>