CHECK THE RECTIFIER, FOR LOOSE GROUND WIRE,OR BAD OR CORRODED CONNECTIONS, SAME WITH THE COIL AND CAPACITOR , ANY WIRES OR COMPONENTS FOR THE IGNITION CIRCUIT, ONE THING MOST FONT CHECK IS THE CONDITION OF THE MAGNETO INVEST in A COUPLE OF ELECTRONIC SPRAY NON RESIDUAL, IT AMAZES ME WHEN I SEE PEOPLE JUST CLEAN AND POLISH CERTAIN AREAS AND THINK IF NOTHING IS LEAKING,SMOKING, ETC... GET INTO A HABIT OF DAYS BEFORE A WEEKEND RIDE , TOP OFF,AIR UP CHECK SUPPLIES,AND ALWAYS YES CLEAN IT BUT TAKE THE MAGNETO COVER OFF SQUIRT SOME ELECTRONIC SPRAY,CHECK AND INSPECTJUST BECAUSE YOU DON´T HEAR OR SEE OR SMELL SOMETHING WRONG DOESN´T MEAN THERE ISN´T, I USED TO HAVE ANYONE THAT I TRUSTED RIDE,THEN YOU MYST SHARE IN THE CLEANING, MAINTENANCE, SOME JUST THINK ALL THEY SHOULD DO IS RIDE THE HELL OUT OF IT, SURE AS LONG AS You MAINTAIN the HELL OUT IF IT,...