Take the belt off and grab the SC snout pulley and wiggle it back and forth. There should be no slop in it. If you feel like something is bumping on the inside when you wiggle the pulley, it'* probably the coupler that needs to be replaced. Pretty inexpensive piece. You can get a rebuild kit from Intense that includes the coupler and the SC oil.
I'm not totally sure, but I think with your year you need to pull the SC off the LIM to pull the snout off. Maybe Dan can slip in here and confirm that. If that'* the case, you'll need a LIM gasket set, etc.