I used co-pilot and asked this question; the response is:
"Which states do no require an endorsement to operate a Can Am Spyder?"
As of now, California, Nevada, and South Carolina allow you to ride a Can-Am Spyder without needing a motorcycle endorsement. In these states, a standard driver's license is sufficient.
However, it's always a good idea to double-check with your local DMV, as regulations can change. Are you planning a ride soon?"
I then asked the following:
"I live in California which does not require an endorsement to operate a Can Am Spyder. Can I operate it in States that do require an endorsement?
Unfortunately, if you're riding a Can-Am Spyder in States that require a motorcycle endorsement, you'll need to have that endorsement on your license, even if California doesn't require it. Each State has its own licensing requirements, so it's important to check with the DMV of the State you plan to visit to ensure you're compliant with their regulations."
I would definitely get a motorcycle endorsement in these States so I can cross the border! (BTW, I don't live in California).