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03 bayou 250 carb issues

oldtruckluvr

By oldtruckluvr
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oldtruckluvr Rookie

oldtruckluvr

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I have a 2003 bayou 250. I rebuilt carb because its sat for a few years. Didn't run before rebuild. Now it starts up but runs terrible. Idles extremely high, which I can adjust. But engine makes a clicking noise, and the rpms drop and bike dies... there is hesitation on acceleration with popping and bogging. What could be causing this? What would be stock setting for air/fuel mixture screw that is on bottom of carb, and setting for idle screw on side of carb? Really confused as what clicking would be. Any help would be great. Thanks

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labs3557 Rookie

labs3557

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If it's anything like my 300 fourtrax, the vacuum piston maybe worn or the seal is bad, I rebuilt mine also and had a needle seat missing and the way you discribed your issue may be the same thing. On my carb the idle screw was 2 1/2 turns out for factory setup.

Hope this helps.

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