So, I ordered a replacement sensor and realized the bike had the original old style "bullet connector" temp sensor. I had one of those act up on an XB9SX that I had. Even though I cleaned out the connector, it would work for a little bit and then get flaky and need to be cleaned. Until I just removed the connector from the mix.
Edit: a little run around the neighborhood, got it up to operating temperature and upon shut off both fan speeds were in play.