This is an old post, but I hope it might help someone with their key adventures.
I just purchased a 2022 CForce 400 and wanted to let people know about my success in finding replacement keys. The keys that came with my machine are part number 9DS#-010130-6000-0MP00 that is listed at this address:
https://cfmotousaparts.com/product/key-blank-cfmoto-oem-9ds-010130-6000-0mp00/I took my keys to a local lock smith (not just a clerk at the local hardware store that is in charge of the key machine for their shift) and after some stare and compare, they chose to use an Ilco KW14 - this is a link to a seller listing:
https://keymateinc.com/shop-online/key-blanks/automotive-keys/motorcycle/ilco-x259-kw14-key-blank-kawasaki-suzuki-triumph-motorcycles-detail.html - they sold me a key for $6 with it being cut.
The first cut of the key wasn't perfect. There is a shoulder on the key that was kind of protruding near the handle, that, once ground off the next day, and the teeth smoothed out a bit, now works! It needs to be smoothed out a bit more for less of a need to fiddle with it, but it does the trick!
I hope someone finds this useful for spare keys for their machine.