My dealership would not exchange the caps and let me install them myself. They said they would need the bike for three days and that if they ever find out that I replaced the caps myself or did any other work on the bike the would void what is left of the Honda warranty. I ordered then from a on line supplier and installed them myself. I found they are available at most any auto or motorcycle supply that sells NGK for any where from three to seven dollars. The number is NGK VD05F
Ron
Ron