To avoid incidents like this one,and because most of the components used on two wheelers are aluminum and the fasteners [nuts,screws, bolts] used to hold these components together are steel, when you remove any of these nuts botls,or screws,"ALWAYS" lightly apply alittle Neverseize on to the threads before ya put em back in.Why?? Cause the next guy that takes it apart just might be you.And if ya should encounter a situation like the one above,try alitttle heat,but not from an open flame. I'm talkin using a good quality heat gun [I just happen have one in my little bag of tricks] as that works pretty good on aluminum.And then,sparingly apply a little never seize on to the threads of that fastener BEFORE ya put it back in,and follow the torque spec for that component,if there is one.If not,use common sense and don't get carried away when torquing that fastener.So like I said,we're dealing with aluminum here,and aluminum has a BAD HABIT of forming corrosion on fasteners,whether it be,bolts,screws,or nuts.WHY?? Because aluminum and steel are two dissimilar metals.