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Everything Dirt Bike
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Float Height
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<blockquote data-quote="Trfsrfr" data-source="post: 210124" data-attributes="member: 3959"><p>A question occurred to me as I was thinking about floats;</p><p>If the mixture is richened by a higher float, can that be offset by using smaller jets, and the same for the opposite?</p><p>And if so, is there any advantages or disadvantages or trade-offs of this? A mixture going lean because of rough terrain comes to mind for a low float setting...</p><p></p><p>Right now the float height on my YZ is set at 6.5mm, right in the middle of the range (5.5 - 7.5).</p><p>The dark plug pic I posted in that thread was with a 172 jet. When I put in the 178 jet it didn't get better.</p><p>The plug didn't get better until I put in the 170 jet.</p><p>So then isn't the 5.5 to 7.5 range just a "neutral" area for which one can jet accordingly? If so, that wouldn't that explain the discrepancy between some of the members' differing opinions on what size jets I should be using?</p><p></p><p>I have also heard some talk of people having a "wrong" float setting and jetting to "correct" that, but if it's anywhere in the float range given, wouldn't that be the preferred way to do things?</p><p></p><p>Example: if a guy sets his YZ float to 5.5mm and uses a 180 main jet and gets a nice color plug, wouldn't that be approximately the same as a guy setting his float at 7.5mm and using a 168 main jet to get the same color plug?</p><p></p><p>Just thinking out loud here trying to get a better understanding of this stuff.</p></blockquote><p></p>
[QUOTE="Trfsrfr, post: 210124, member: 3959"] A question occurred to me as I was thinking about floats; If the mixture is richened by a higher float, can that be offset by using smaller jets, and the same for the opposite? And if so, is there any advantages or disadvantages or trade-offs of this? A mixture going lean because of rough terrain comes to mind for a low float setting... Right now the float height on my YZ is set at 6.5mm, right in the middle of the range (5.5 - 7.5). The dark plug pic I posted in that thread was with a 172 jet. When I put in the 178 jet it didn't get better. The plug didn't get better until I put in the 170 jet. So then isn't the 5.5 to 7.5 range just a "neutral" area for which one can jet accordingly? If so, that wouldn't that explain the discrepancy between some of the members' differing opinions on what size jets I should be using? I have also heard some talk of people having a "wrong" float setting and jetting to "correct" that, but if it's anywhere in the float range given, wouldn't that be the preferred way to do things? Example: if a guy sets his YZ float to 5.5mm and uses a 180 main jet and gets a nice color plug, wouldn't that be approximately the same as a guy setting his float at 7.5mm and using a 168 main jet to get the same color plug? Just thinking out loud here trying to get a better understanding of this stuff. [/QUOTE]
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