MCP said, " I had a problem with my CDN insurance company this Feb, (bike was in Mex at the time) they wouldn't issue a new decal because I had been insuring it out of province for 5 years. They wanted to see it, so I rode it to Tucson, then had it shipped to Wash state and got it there".
That hassle is why I carry inexpensive liability only insurance on the bike I use in Europe for my fly-bike-store it-fly home scheme.
Additionally, CA requires liability insurance for annual registration renewal and this is a cheap way to avoid messing with the authorities back home. I left a bike in Mexico for almost 10 years this way before riding it home legally.