I bought this bike for my father-in-law in 04' and brought it back from Baja last Thanksgiving(he bought a 450X). I completeley tore it down and rebuilt everything. New suspension, all bearings, new rims/spokes, tank, jetting , pipe, Blah blah blah!
I am using it for everything from woods riding to pre-running in baja (racing a 650R, but why not the DRZ?). All in all, the best allrounder' there ever was.
BTW, radiator guards are a must on this bike. I popped a rad in Baja in March from a simple tip over on the kickstand.
KTM 520 EXC