You've tried the obvious , but have you done any repair / modifications lately (tank removal/ handle bar adjustments especiall rotation of light switch ,for a more comfortable operation.? The wiring wiggle test is still your best search option. Moving / vibration triggers fault , check for acute angle in wiring entry's and cable runs.
Answers & Comments
You've tried the obvious , but have you done any repair / modifications lately (tank removal/ handle bar adjustments especiall rotation of light switch ,for a more comfortable operation.? The wiring wiggle test is still your best search option. Moving / vibration triggers fault , check for acute angle in wiring entry's and cable runs.
Sounds like bare wiring touching a ground.
Check for seat clearance above the battery terminals.