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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Yz 426 2001
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[QUOTE="Hick, post: 171916, member: 19514"] As mentioned already it could simply be your jetting, you ride in much thinner air at your altitude than most folks for whom stock jetting works fine. If you are fouling plugs due to rich jetting changing the main jet is not the solution. As for the rough running at ¼ to 3/4, it sounds like you are rich on the clip position, not on your main jet. Try dropping your needle 1 clip (raising the clip). You may also try a 40 pilot (stock is 42), this should make it easier to start and an overly rich pilot is normally associated (in addition to accelerator pump abuse) with fouling plugs due to rich jetting. I’m curious as to how exactly you shortened the accelerator pump stroke, and where are you making the 8mm measurement? [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Yz 426 2001
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