As Tim stated, there’s a spacer which replaces the C-clip (the C- clip which holds the clutch drum in place). Russell has them, and when you ask they’ll know exactly what you’re talking about. They also wear, so get 3 or 4 of them at least. You’ll need to change them a couple time a season.
Oh, and by the way, unless the bearing starts to loosen up, don’t change the clutch cover/third bearing support. It will still work just fine!