May have frayed wires causing a short. Look for two wires that have rubbed together and possibly had the insulation worn away.
Smacking the panel might separate the wires enough to get it running again.
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2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs