I have an 02 660 and for some reason or another, the reverse light will flash on and off from time to time. When it first started to blink, I figured that it was a fault in the transmission of some sort that it was detecting, but I found it hard to believe that it was capable of that. After a few times of blinking, I came to the conclusion that it isn't any sort of warning. It will start blinking intermittently totally indiscriminate of how I am riding or how far into riding I am. Sometimes it will start flashing the moment I start it up. I have the service manual and I can't find anything that helps me out. I really don't think this is anything to worry about, I have been riding with this problem for the last couple of months. I am just curious as to what is causing this.