A friend has an '01 520 EXC and asked for help setting up his suspension. (He rides the thing like a bat out of hell and hasn't even touched the suspension settings. I have enough problems trying to keep up with him now.) We measured race and free sag and both were too high (120 mm RS and 40 mm FS). Obviously, the preload needs to be increased. I got out my big flathead screwdriver and and hammer to try to loosen the big locknut on the shock but it wouldn't budge. It appears that the head of the set screw on the nut is facing the airbox. Now what do we do? Remove the tank, seat, and subframe just to get to the screw? (My WR400 has two lock nuts so this kind of thing isn't a problem.) I've got two choices now: figure out how to fix it or tell him it's hopeless and leave it the way it is. I might have a better chance of keeping up with him if we don't touch it.