I picked up my bike a few days after I bought it because they didn't have the parts in stock and were put on when I took delivery. I took off the passenger backrest yesterday because the better half doesn't go with me much when it gets cold. My question is with the plastic "grommets" that the bar locks on to. Do you guys leave them on? Will they blow off because I noticed you just pull them apart to get them off. I would rather leave them on, one less thing for me to loose but if there is a chance of them blowing off then I will take them off.