yz 426 I need help.

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Oct 14, 2007
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I have a 02 yz 426 that I have just made street legal. I live in maryland and i have had some issues with idleing. I have Pro circuit T-4 exhaust and header and modified air box. Do I need to jet the carb? if i do is it easy?

Here is what happens. start the bike (one kick) let it warm up while it idles it may stall.turn the pilot screw up and finally get on and ride and everything is fine. when riding and coming to stop the bike pulls when in gear and seems as if throttle is sticking. What do i do?