I just got back from a very interesting 3 day trip on my GL1200a. One mile from home my bike quit, and my brother in law and I got it working again, after figuring the bike wasn't getting fuel. I think we reprimed it, or possibly did nothing, and the fuel pump started working again. 350 km later, it quit again - in downtown Parry Sound, Ontario. We fooled with it again, and determined the fuel pump had given up the ghost. It was clicking away, but only dribs and drabs of fuel spitting out.
Along came a fellow named D'arcy, from HT cycle sports, who got us going by hooking up a gravity feed motocross tank to my carb inlet hose. It started immediately. We rode to his shop, and the next day went to NAPA and bought a universal electric pump - model UNG E8016S. (It puts out 2.5 - 4.5 PSI, just about right - the Honda one apparently is about 3-5 PSI) Put the new pump in, and the bike ran great. Did another 500 km and got home yesterday.
I realized in hindsight that the bike was getting harder and harder to start over the past month. Usually this bike starts with a 1 second touch of the button. I was having to crank it sometimes 10 seconds to get it to go.
I learned a few things anyway. 1) If something changes with your bike (harder starting) pay attention. 2) You meet the nicest folks when you break down. 3) You don't always needa genuine Honda part to get you on your way. 4) Fuel pumps don't always quit cold turkey.