Z650 oil pressure

Hi all, I just put my z650b on the road and have come across a small prob that maybe someone on here can help me with. The bike seems to run fine but when it heats up the oil pressure light comes on at idle. I am wondering if it is a bad oil pump or if there might be something else at play. Bike has new oil and filter but does need the carbies synced. Any thoughts??. Rick

Before you do anything else, swap the oil pressure switch.

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(-8

Thanx Brett, I will give it a whirl.