Honda ATV Forum - View Single Post - 2004 400ex HELP i have air pressure building up in oil tank
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post #7 of (permalink) Old 05-13-2019, 07:43 PM
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Yikes. That sounds like you got a float sticking in the carb. What ever you do dont run it like that. The fuel will leak into the combustion chamber through the valves and clean off the carbon buildup and dirty the oil real quick. Which also explains why its way over full aswell. Most of the time when the floats sticking it will leak out the over flow tube out the bottom but i have seen them get clogged with mud and cause the fuel to find the next path and thats directly into the engine.

07 416ex
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