Oil Light comes on sometimes

[stevekaz1974]

Need some help or advise please. I have a 1998 xj600. Just noticed that when I open the oil filler cap while bike is running its making noises in the crankcase and I can't see any oil circulating or moving around. My oil light does comes on sometimes when I start the bike, but usually goes off as I start riding it or sometimes when I jump up and down or shake the bike while idling the light turns off. Is this a sign of a bad oil pump? And does it sound like maybe parts in the crankcase could be damaged due to no movement of oil. I just don't understand cause my light doesnt stay on all the time, usually just at idle untill I start riding it and thats only at the first start up. I've checked the level and it always seems to look about 3 quarters full looking through the glass window. Now on the other side of the bike right below the shift shaft or around there looks like oil maybe leaking a little. One more question? I unscrewed the nuetral switch and some oil came out from behind it. Is that normal? Thanks in advance and sorry for all the questions. Just can't seem to figure out what the problem is