Went for a 130 mile round trip ride today. About 20 miles out I noticed my oil pressure was reading about 10-15lbs. As I gave it gas the pressure would go down, as I let off the gas the oil pressure would go up. My buddy and I stop to check it out. I turned of the bike and we discussed the problem for about 5 mins. When I started the bike the oil was back up to 30 or so lbs. Was fine for the rest of the trip there. On the way back it was fine until we stopped to have a drink of water. When we got back on the road I noticed again the oil pressure was low again. It stayed that way all the way home. Dosen't seem to be any damage to the bike. I don't know if it is my sending unit, oil guage or oil pump. Has anyone else had this problem?????