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Old 02-24-2010, 05:23 PM   #1 (permalink)
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2003 xc 500 carb settings

I would like to know if any one has changed the stock settings and what they are. Mine seems rich and bobbles a bit.I would like to clean it up. Running in Mn. Thanx for any advice.
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Old 02-24-2010, 06:48 PM   #2 (permalink)
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Welcome to the forum!

If you are running stock jetting, you can probably safely go one size smaller on the mains. WHat color are your plugs? How's the piston wash? If your plugs are black after a wide open pass, the mains can go at least a one-size smaller.

Check your jets, compare what are in your carbs with the jetting chart for your elevation and the temperature you are riding, and make sure you are at least that size.
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