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1998 XCR 440
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13,109 Posts
It should idle between 2000 and 2500 RPM. I dunno about carb settings tho.
 

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If you give the engin # I can probably get closer but my Intertech man. says 280 mains, 30 pilot jet, position 3 on needle, and 2.0 throttle cutaway for engine # EC34PT-05 used from 77-78. This is a free air engine with 32 mm carbs.
 
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