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Leaky carb 03 WR450

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I realized this morning that my carb seems to be losing a little fuel when parked, I think into the engine. When I turn on the petcock I see fuel flow, which shouldn't happen. 

 

I'm guessing it's the needle, but I could be wrong. Any suggestions on where to pick one up, or what else to replace while I'm in there?? The OEM needle is fairly expensive ($16... a lot for what it is) and in my experience OEM parts take forever to ship. 

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visually check the needle and seat for wear

you need to polish the cavity the needle valve sits in to remove any corrosion

you might want to buy a petcock rebuild kit too, as they seem to wear out at the same time

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