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Old 07-16-2011, 12:22 PM
nyfdom's Avatar
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Knocking noise

At idle it sounds like the engine is knocking, but then quad drives just fine... It's a 2000 scrambler 400. Anything I should be checking?
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Old 07-16-2011, 12:32 PM
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If it is just at idle, there is a good chance you are hearing the primary clutch. It will make a knocking sound when the o-rings wear out in it.
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Old 07-16-2011, 12:41 PM
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Should it make a difference if it's in forward/reverse/neutral? This mean I'm likely going to need a new clutch then soon?
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Old 07-19-2011, 02:55 AM
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Quote:
Originally Posted by nyfdom View Post
At idle it sounds like the engine is knocking, but then quad drives just fine... It's a 2000 scrambler 400. Anything I should be checking?
Grab the plastic clutch cover and pull up slightly when its running at idle and see if the knock goes away. Mine does the same thing. Its the primary clutch hitting the cover. Worth a look.
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