I have a 07 450, my friend has a 06 250f....and we both have a problem. The brass inserts in the gas tank are spinning and not allowing the rear shroud bolts to come out. I've seen threads regarding this in the past but I cant find them. I know we aren't the only ones with this problem, so what gives? How did you guys remedy this. I was going to perform preventative Anti-Seize maintenence, but was too late! HELP!!!!!!!