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2009 Sportsman 400 AWD engine knock at idle


SP400

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Alot of the newer 4-stroke motors have a very thrashy sound, especially at an idle. A TRX 450R sounds like it is going to fall apart when it is idling, but as soon as you hit the throttle, it sounds great. Just to be safe, take it to the dealer that you bought it from and have them listen to it, they will be able to give you the best advise.

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