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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250 Carb, jetting and weather condition
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[QUOTE="biglou, post: 442235"] General rule of thumb, the three H's will cause you to have to lean out the jetting: Height, Heat and Humidity. The more of any of those you get, the leaner to jet. The less of those you have, the richer. SOunds like the change in your weather would have called for richer jetting. Just how much, I can't say exactly. Hope this helps. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
YZ250 Carb, jetting and weather condition
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