I have what I believe to be an early production R12GS. I was riding 2-up with a full tank when I had that same thing happen. Felt like it ran out of gas. The dealer first replaced the left side fuel pump, which has a fuel pressure regulator on it as well as the CanBus controller. But when the dealer took it out for a test ride, the same failure occurred. So, they replaced the right side pump which has another pressure regulator of some kind. Problem fixed (until it rains, apparently). Larry
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