Rubber boot on bottom is same ID top and bottom, and there's no retaining groove on the metal piece The OEM rubber boot is sized for thin cable on bottom and molded to fit into groove on metal fitting/adjuster on top.
Also, the OEM cable has a double housing for toughness, larger OD. This cable does not, so it doesn't get held properly by the clamp on the fork. Adapter needs to be made for the clamp.
Spend a few bucks more and get genuine Honda parts.