Pulled off my right side PV cover to investigate WOT performance issues. I found the allen head retaining bolt had come loose and was laying next to the push rod hole. The flapper pivot rod was sticking out about 1cm. THE WASHER IS MISSING! Looks like it fell down the hole. I estimate I ran at least 100mi of very hard riding under this condition....maybe more. Any advice on how to proceed would be greatly appreciated.