I have recently been having problems with my rotorbolts coming loose, i have since locktighted them but I was wondering why i only had this problem recently rather than since i got the bike?
probly becasue locktite doesnt last forever when its been riding in dirt,mud,rain also if you used a pressure washer on it it may have got into the thread and washed the locktite out.
Funnily enough(not wheely though) my rotor bolts too had a thing for coming loose.Instead of putting on some locktight stuff,i just kept on tightening them and after riding heaps all the grit from many rides helps lock the bolts in.Well atleast that's what i believe.
just do a shaun o conner... ride with only 3 bolts for each

lol
or you could have all in locktight them and let them sit for 24hrs before riding and ake sure they a fulyl tighten up otherwise i would buy knew bolts they could be stripped.
with locktight both surfaces need to be cleen and dry for it to work but if you are using PH 25 Torque bolts i would only put a little bit of Locktight on because Locktight sets like Super glue
just do a shaun o conner... ride with only 3 bolts for each

lol
A good weight saving strategy along with making speed holes in your frame and removing every second spoke.