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04 yz450f leaking fuel

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Hi everyone I have an 04 YZ450F and it is constantly leaking fuel from the carb overflow. I have cleaned every part in the fuel system, changed the needle, adjusted the floats to factory spec and still leaking fuel. I am not sure what else I can do so any help will be greatly appreciated.

Carp is a kelhin flat CR

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Pull the float needle, inspect the seat for pitting and the needle for grooving

Replace if needed

There is also an oring under the seat that goes bad

You have to use a mini-slide hammer to remove the seat

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