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09 YZ250f been sitting for a while, now wont start

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I let the bike sit for about a year and it won't start now. It will fire up if I catch it in gear but dies within 2 seconds. I tried to draining the float bowl still no luck. I've got a spark plug on the way and if that doesn't work I'm thinking pilot jet? Any other ideas?

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Clean the carb for sure. New gas too.

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Yeah sounds like pilot jet, especially if you can keep it running by revving it constantly but it won't run at idle or cracked throttle. I wouldn't bother cleaning it either, just replace it since the pin hole is so small.  

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