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2004 Honda 400ex - Nosie ~ Please Help

katie-kate

By katie-kate
in Honda ATV Forum

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marioweldinginc Veteran

marioweldinginc

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Posted

Sometimes upon start up whether cold or warm but mostly cold the decompressor makes a slapping noise. it can last for 10 seconds to a few minutes. I would check your torque spec on that valve and make sure its not stripped. Im not sure if its ok to do but maybe put red loctite on the jam nut. never seen em keep getting loose

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