I bought the bike used. The two pieces that fit together thru the rear of the seat to create the passage for the bolt that secures the seat to the sub-frame, have always just come apart when I remove the seat. Also, it's kind of a pain to get the seat back on with the bottom piece falling into the airbox often. I'm guessing these parts are supposed to be stuck together somehow thru the seat. If so, how? 2011 EC 300