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valve adjustment

2636 Views 1 Reply 2 Participants Last post by  Helmut
What are signs that a valve adjustment is needed. I have a 2005 400ex figured it might be due. I bought it used and doubt they have ever been adjusted
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If they're too loose, you will here a ticking or tapping sound in the top of the engine. If they're too tight, the ATV will start getting hard to start.
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