Awesome ride today, but partway through the day I noticed red fluid draining out of my rear shock and the rubber bumper is totally gone. My kit is a 2012 ST -- are problems with these shocks common? I'm pretty careful when I'm riding and I don't do anything crazy like getting big air or anything like that, so I was surprised that the bottom seal on the rear shock blew out. Is there a fix other than replacing the shock with a new one? Can they be rebuilt?