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Hi. My Legend is carburetted, but here are my two cents.
It's one thing if your fuel gauge is going wacko because the gas is sloshing back and forth in your tank and the gauge doesn't know where the gas level really is. It's quite another thing if, e.g., your fuel sending unit is acting weird because it's shorted to another circuit (brakes, fuel injector).
One quick test would be to apply the brakes when your stationary and see if the fuel gauge changes or if the power cuts. If it only happens when you're riding, instead you could apply the brakes with a full tank of gas... since tank is full, sloshing shouldn't affect gauge too much.
If the problem is unrelated to braking and to amount of gas in tank, but there's just a short in the fuel sending unit, and if it's intermittent (only when riding under certain conditions), check the wiring diagram to see what else is on the same circuit as the fuel sending unit.
Perhaps there's a short to a circuit connected to the fuel injectors. Have any more details to help diagnose?...Jerry
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