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xr100 odd problem

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my xr100 runs like crap at low rpm, idles low and stalls when coasting to a stop. today I turned the gas off and let the bowl run out of gas, after about 5 mins the idle smoothed out and it ran perfect with the gas still off, once I turn the gas back on it runs like crap again. I cleaned the carb every jet is new, what would cause it to run better when running out of gas? im stumped on what my problem could be??

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Carb float height set too high.

have adjusted the floats on these carbs? And if so what's the process

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This tutorial will give you the basics on setting the float. Without knowing the height spec for your carb, just set it as shown in the video so that the bottom, flat side of the floats are parallel with the float bowl mating surface of the carb, as in, on the same plane, doesn't dip below or above.

If its off some, dips below, the float is set too high. Bend the tab that the fuel inlet needle hangs from as shown in the video, to correct it.

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