Hope that I am way too late!
My FSE 450 acted exactly like you described although it never quite got to the point of not running at all. Installing a pair of those NAPA AR 614 relays (they are cheap, figured at worst I would have a usable spare if needed out on the trail someday) made it a different bike, no more "flame out", could hear the pump prime every time I turned on the key. So far it's my best improvement, someday I will do the master link stand fix and cut the blue/yellow wire, have to make some time for that, and to actually RIDE the bike.
Bruce
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No one ever calls the Fire Department because they did something smart
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