I just got a 1973 CB350 barn find that only had 9000 miles on it. I did all the routine maintenance: Fresh oil, plugs, clean carbs, clean tank and new fuel lines, valve adjustment. It started up rather easy and idles nice. I took it down to the gas station to fill up the tank and noticed the oil light came on after a few miles. Im guessing this means I dont have oil pressure? Any suggestions on what I should check. Thanks