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Dirt Bike Brands - Other
XR 400 high altitude riding
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[QUOTE="Trailryder42, post: 118417, member: 17282"] My '00XR4 has Gordon mods, snorkle removed, UNI filter. I run 155/55 here at home at 3600ft.. When I go to the mountains I jet it to 150/50 and drop the needle 1 position. I agree with the others about dropping the front sprocket to a 14. It will make a world of difference on knarlly mountain trails and will also help make up for poor jetting if you don't get it dialed in just right. Don't forget to readjust the fuel screw for best response once you're up there. Derek [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
XR 400 high altitude riding
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