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<blockquote data-quote="Rack" data-source="post: 14715" data-attributes="member: 4">I bought the bike and it had already had the following modifications........When the original owner purchased the bike he had the dealership install the GYTR jet kit and GYTR end cap. He also removed the charcoal cannister and overflow catch tank. Other than that I am not sure what has been done to the bike by the previous owner. I purchased the bike with 137 miles on it. When yama_dawgg first rode the bike he thought everything was fine. A few weeks later Mike in Fresno rode it on the Bass Lake 250 D/S ride and said it seemed under powered and didn't have any snap or pop.So two weeks ago yama_dawgg is telling me its bogging and dieing on him. So I jump on it and give it a go and sure enough it runs like crap. In talks with Mooney he says bring it over lets check it out. Turns out it has a 165 main jet in it. So we/Mooney changes it out to a 172. The next day we go riding and everything seems to be just right! <img src="https://www.dirtbikeaddicts.com/static/images/smilies/thumb.gif"&nbsp; class="smilie" loading="lazy" alt=":thumb:" title="Thumb&nbsp; &nbsp; :thumb:" data-shortname=":thumb:" />The reason for my post is to try to gain a little more insight as to what the &quot;ideal&quot; jetting set up would be, if there is such a thing.One last thing, we discovered at Mooney's house that yama_dawgg over oiled his air filter <img src="https://www.dirtbikeaddicts.com/static/images/smilies/bonk.gif"&nbsp; class="smilie" loading="lazy" alt=":bonk:" title="Bonk&nbsp; &nbsp; :bonk:" data-shortname=":bonk:" />.</blockquote>

[QUOTE="Rack, post: 14715, member: 4"] I bought the bike and it had already had the following modifications........ When the original owner purchased the bike he had the dealership install the GYTR jet kit and GYTR end cap. He also removed the charcoal cannister and overflow catch tank. Other than that I am not sure what has been done to the bike by the previous owner. I purchased the bike with 137 miles on it. When yama_dawgg first rode the bike he thought everything was fine. A few weeks later Mike in Fresno rode it on the Bass Lake 250 D/S ride and said it seemed under powered and didn't have any snap or pop. So two weeks ago yama_dawgg is telling me its bogging and dieing on him. So I jump on it and give it a go and sure enough it runs like crap. In talks with Mooney he says bring it over lets check it out. Turns out it has a 165 main jet in it. So we/Mooney changes it out to a 172. The next day we go riding and everything seems to be just right! :thumb: The reason for my post is to try to gain a little more insight as to what the "ideal" jetting set up would be, if there is such a thing. One last thing, we discovered at Mooney's house that yama_dawgg over oiled his air filter :bonk:. [/QUOTE]

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