1986 V65 magna sub-fuel tank clogged. or understanding the inner working of? V65 sat for 13 years on patio. gas was left in tanks. I have replaced fuel pump and filter, cleaned the gas on/off switch inside and out. unable to clear the inner tube from aux tank to on/off switch so that gas may flow. how do I clear it? I cleaned inside of tank with gun cleaner. seemed to do the best job without damaging anything. still clogged. canĀ“t see inside far enough to figure out what is causing the problem.