Count the number of teeth on the thin gear and the thick one. It varies by one tooth. Meaning every full turn the thick gear makes the thin one goes off by one tooth. If you have all parts correctly located in place when bolt is tightened the thin gear is not 100% hard locked, it drags back by that one tooth with every revolution. It is basically clutched by the fastening pieces and still turns but with effort. That's what allows it to slightly not turn as fast as the thicker gear.
It is an automatic recompensating anti-backlash device to keep all the slack in that gearset to a minimum to lower gear noise and impact hits to the gear teeth. It saves having to match the primary gears in matched gearset pairs too, which would be needed if it wasn't there and allows machining tolerances to be looser with no issues. $$$$$$ saved for Honda making the engines.
You take a screwdriver and carefully pry the thin gear teeth to move it. You make both the thick and thin line up teeth at the gear contact point of the clutch basket housing gear. That makes the mismatch happen on the other side of gears where it hurts nothing and that is the way the gears run in use too.