I HAVE THIS 1987 SUZUKIGSXR 400 MOTOR BIKE .IT HAS JAPINESE.SYMBOLS ON IT A LIGHT COMES ON WHEN I GO OVER 50 MILES AN HOUR ITS A LIGHT THATS BESIDE THE SIGNAL LIGHT .AND IT ONLY COMES ON WHEN I GO OVER THAT SPEED AND IT STAYES ON UNTIL I GO UNDER THAT SPEED ..CAN ANYONE TELL ME WHAT THE LIGHT IS FOR .PLEASE