just snagged a '03 400ex. noticed the front drive sprocket is loose/wobbely on the shaft. it supposed to rattle around a bit ? the shaft is solid, just the sprocket it self is sloppy. also is it easy to replace ? no massive surgery ? not a bike mech or interested in paying 65 a hour for shop time [img]i/expressions/face-icon-small-frown.gif[/img]

 

Shouldn't wobble. Sprockets are cheap, just replace it.