Another 2024 Update, I'm posting because this thread was the best resource I found in my search. I hope to add to the knowledge base just a bit.
I got a 2014 Forza 300 in November 2024, with about 14,000 miles on it.
I assumed it was a chip key -- wrong. I found and ordered the blanks on eBay. Oops, I actually ordered them on Amazon.
$25 for a pair.
https://www.amazon.com/dp/B0BNMCS7TC
On eBay, a listing that should work would be this one or similar, using a search like "forza 300 key blank 2014 honda"
https://www.ebay.com/itm/155049898903 Two keys for $25ish plus $7 or so shipping.
I took my first blank to the local mom & pop hardware store, and had them cut a key from the one key that came with the bike. The resulting key "sort of" worked. I had to jiggle it a few times to get it to turn. I decided to take the 2nd blank to a locksmith to see if I could get a better outcome, a key that doesn't stick and that I could have confidence in making copies of. I looked at locksmiths in the area and chose Y-S Locks & Keys in Orlando. He was new to Honda scooter keys, but WOW, what a fantastic job he did. He verified my blank was the correct one, using some online resources, but instead of just cutting a key from the original, he *digitized* the key pattern, mapped it into his key cutting machine, and had his CNC-like machine cut the key from the digital version. Some of the small peaks on the original key were not present in the resulting key, and I asked him about them. He explained that the original process at the dealer involved "punch machine" duplication, that didn't "cut" the key, but instead "punched out" sections of the key blank with a side impact, and that the small peaks were an artifact of that process, not an essential part of the key..
In any case, the key resulting from his process worked smoothly and flawlessly in my Forza 300, and the locksmith also gave me the key number and digital specs for cutting it, that he said most locksmiths would be able to cut the key from those specs, without needing the original key. However, I bet if I took the key he made to my same local hardware store, and had them cut a new key from it, using my blank, that the resulting key would also work flawlessly. I'll try that someday, next time I need a key.
I will key the first, hardware-store-cut, key that sticks a bit, as an emergency spare. The locksmith-cut key is the primary one I use now, and I'll keep the one that came with it as the first backup, oops-I-can't-find-my-main-key backup.