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Everything Dirt Bike
Make / Model Specific
Yamaha
07 WR 250 F Jetting
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<blockquote data-quote="cleonard" data-source="post: 14727" data-attributes="member: 21"><p>+1 on no ideal. All you can hope for is the best compromise. You can jet for a mid point of perhaps change it a bit for winter vs summer. The main only really adjusts wide open. The two most useful change are the needle and the pillot screw. If I have the time I will drop the needle a step for high altitude riding for places like KM where I'm riding 7000-10000ft. </p><p></p><p>I can get by with no changes since I'm on a big bore. It's more important for a 250. Remember regardless of jetting you loose power at high altitude. It takes air to push that piston. Less air means less push.</p></blockquote><p></p>
[QUOTE="cleonard, post: 14727, member: 21"] +1 on no ideal. All you can hope for is the best compromise. You can jet for a mid point of perhaps change it a bit for winter vs summer. The main only really adjusts wide open. The two most useful change are the needle and the pillot screw. If I have the time I will drop the needle a step for high altitude riding for places like KM where I'm riding 7000-10000ft. I can get by with no changes since I'm on a big bore. It's more important for a 250. Remember regardless of jetting you loose power at high altitude. It takes air to push that piston. Less air means less push. [/QUOTE]
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Everything Dirt Bike
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Yamaha
07 WR 250 F Jetting
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