it covers the positive battery terminal to prevent shorting.
thats funny i had the same thing sticking inside my AIS tube coming of off the airbox , dont know what it is but its the same little cap i had in my bike
Only thing I can imagine it would be is perhaps a cap for the battery before installation? Does it look like it would fit that role?
Hmmm perhaps. I'll find that out when I take out the battery to replace the damn rectangle nut thats SUPPOSED to stay STILL when you go to unbolt the postitive terminal!!!!!! I used a 1/4 ratchet and on the first turn it rounded out!!! Cheap soft ass brass!!! It was the first time I touched the battery and all I wanted to do was hook up my battery tender leads!!