At near 8,000 miles pulled plugs on my SilverWing. Purpose: take a look, add "Never Seize" on the threads, check gap....but no intention of replacing as Honda recommends at 8,000 miles. Replacement R plugs are no long a dollar or two items.
So gap ok at .031 inch, no sign of wear or eating away, used "Never Seize" on threads and may look again at 30,000 miles. Purpose of "Never Seize"---as miles pile up won't rip threads from head as I try to get plugs out.
To make sure I have right on board tool assembly, used these tools rather than my normal shop tools. Instructions for plug removal are in owner's manual, including plug gap.