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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
03 YZ85 Jetting...
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[QUOTE="karterron, post: 592796, member: 29122"] I've found that the only way to properly jet is to experiment with it yourself. There have been many posts in the past about the YZ jetting and they seem to be all over the spectrum. I would start going one step leaner if you are eating plugs and do it one item at a time. First go up one notch on your needle since that is free. See how it runs with that first. Then go one size down on your pilot. For us, one step up on the needle and running better oil and gas cleaned ours up and we have not fouled a plug since doing that. I run a Amsol's synthetic premix with high grade gas. No more spooge out the exhaust and no more fouled plugs for us. Jetting is not an exact science you can get from a message board. There are too many factors that play into it. Altitude, barometer, ambient temp, and fuel/oil mix all play a part and nobody else will be exact to yours. Thats why you see such a wide range on jetting recommendaitons. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
03 YZ85 Jetting...
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