FOR OVER A YEAR 2004 YAMAHA ROADSTAR MOTORCYCLE HAD THE VALVES STICKING WHILE RIDING IT , CAUSING IMMEDIATE LOSS OF POWER. IT HAD 8000 MILES ON IT . THIS HAPPENED AT 4500 MILES. I DID WHAT YAMAHA ADVISED TO DO TO AVOID THE SITUATION, IT DIDN'T HELP. THEY KEPT GIVING ME THE RUN AROUND. THEY KNEW IT WAS A PROBLEM WITH THIS MOTORCYCLE HAD TWO CARBURETOR FIRES AFTER IT LOST POWER, AND I HAD TO HIT THE THROTTLE HARD TO GET THROUGH AN INTERSECTION. *AK