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400ex has a slight tick

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are these quad suppose to have a slight ticking sound?
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Everyone I have heard, thought it was just mine.......
A little ticking might normal. It's an air cooled motor and some noise is normal. Depends on what is doing the ticking. The cam chain is responsible for noise more than any other part and pistons are #2. Valves are way down the list. Valves in OHC motors normally get tighter with use unless something serious is going wrong.
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