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2003 rm 250 air screw setting

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I have a 2003 rm 250 with fmf gnarly and shorty silencer , I just rebuilt the carb on it ,what should I be getting the air screw at?

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what ever the manual calls for.  Which is usually balancing idle speed and smoothest idle, that doesn't stumble on sudden acellaration.  Make sure engine is fully warmed up first.

Edited by Weezer the Geezer

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11 hours ago, yamaharider67 said:

I have a 2003 rm 250 with fmf  gnarly and shorty silencer , I just rebuilt the carb on it ,what should I be getting the air screw at?

this depends on the pilot jet size and temp and elevation , but 1.5 turns out puts you at a good starting point

google spanky's jetting guide for tests to find the correct pilot jet size and correct air screw adjustment

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1.5 or 2 turns out is where I usually put mine after any sort of rebuilding. Then 1/4 turn adjustments for fine tuning.

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