squeaks when hot
 

Hi all.
Ive got a cbr600fy(2000) model and have noticed lately that when engine is pretty hot and idling I can hear a strange squeak or squeal. It sounds like its coming from the water pump area.
Does anybody know if this is a commmon problem on these bikes?
Its running fine and not overheating.
Any suggestions would be cool.
Cheers
Andrew