Bad connection means loose wire pretty much 
Check the connection under the front plastic, obviously, duh me lol
Check the connection under the front plastic, obviously, duh me lol
yea that's exactly how it happened after a hard day of riding...aight thanks manmy first yfz light stopped comin on after a hard day of riding.. and it never worked again.. i took it too houston yamaha too get a new spark plug and oil change and brakes.. and after that they fixed it.. guessing a loose wire or a bad connection.. follow the wires lol[/b]