It will increase the noise in humid, wet, or cold weather...
If you notice a change, not weather related,... check the tightness of the front pulley nut...
Mine started making noise when it came very slightly loose... no amount of tightening would fix it for more than a couple of days... until I replaced the splined washer under the nut,.. $3.00 fix,... then all is well again...
(I thought the noise was cam chain)( Nope!)...
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