grinding sound at 2000 rpm

quizesilver

Registered
Dear all,
I noticed a grinding sound from the engine only at 2000rpm (+/- 50rpm) and no where else. what could be the problem? any of you guys had this problem? or is this normal?

read again, when the rpm go up passing the 2k mark, the sound come in.
holding it the sound still there, once over, the sound is gone... when coming down to a stop or wat, passing the 2k mark the sound come back again....

pls advise. thanks.
 
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