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F4i engine noise

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Old 03-26-2015, 07:43 PM
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Join Date: Nov 2013
Posts: 13
Default F4i engine noise

Hi everyone just curious on if this noise is normal or not. I just recently changed my CCT from automatic to a manual one and changed the spark plugs as well. When I'm riding around 3500rpms and higher I hear this whistle/ winding sound. Kind of like a supercharger noise. What could be the problem? Thanks
 
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