I'm trying to adjust my rear shock spring for the correct riding sag. I'm trying to loosen the top lock nut. I have lubricated the threads with WD-40 and have been banging on it with a long punch and screwdriver. I can only access it from the right side (opposite of the airbox access). Is there another way to get at that lock nut? Do I have to remove the airbox or subframe to do this? What have you guys done?