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Nephew's new 05 YZ 250 F

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Does not want to idle at 4500' barely runs at that elevation. Sputters and spits at speed too. Jetting ideas or anything else. Let me know.

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yea that high elevation with the thin air f's it up depends on where u live when i go riding in a couple weeks i have to bring a bunch of jets with mee soo i can adjust it going ridin to our yearly trip to frenchville pa great riding like 5 thousand feet of elevation somtin like that

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Beyond rejetting the bike, most all 05s I have seen need the pilot jet cleaned out and the hotstart plunger lubed.

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