Thank you, Maniac. If your information is accurate, then Rider89 risks financial loss if he follows my advice.
But please consider what events must all happen to cause seizure of the motorcycle. In the first place, the government of USA would need to record the date that the vehicle entered USA, an action which happens so often, and at so many places along the border, that a prohibitive amount of mostly useless data would need to be recorded, sent to a centralized site, and remembered there for an indefinite period. There is too much data for this to occur. In the second place, a law enforcement officer in Texas, an employee of either a state or a county or a city, would need to become interested in stopping Rider89, learning from Rider89's mouth when Rider 89 entered the country, finding out whether an offense may have occurred, then conveying all this information to the government of USA. There is just no likelihood of everyone involved in this complex process giving much of a damn about the matter.
GreyGhost brings up an important point, namely insurance premiums are lower in TX than in AB. They sure are. Therefore I suggest that Rider89 arrange insurance with an insurer in TX as soon as possible. I have purchased insurance for a motorcycle I purchased in Ontario and carried on a trailer to my home, which is a long ride due south from Point Pelee. The insurer cares about three issues, the identity of the rider, the identity of the vehicle, and payment of the premium. Nobody cared that my license plate was from Ontario. A few months after moving, I went to the trouble of importing the motorcycle to the state in which I live, which again cared about my identity, the motorcycle's identity, and payment of some fees. Please note that after I left the Peace Bridge with that motorcycle, the government of USA had no say in the matter, and there was no mention of duties or import taxes. In short, my state did not tell Uncle Sam to pester me for anything. I suspect the same might happen in Texas, but it is wrong to make any assumptions about anything in Texas.
Pulled from a hat, here is the name and rating and phone number of an insurance agent in Del Rio Texas, which is not a likely destination for Rider89, because anyone with the wits to live in Alberta can rapidly learn a lot of reasons to steer clear of Del Rio.
Good luck to Rider89. You may want to import your bike to Texas, insure it there, then later renew your long-expired Alberta registration. I am sure that lots of Albertans let their plates expire while doing lengthy restorations, then renew their registration after some years, when the restoration is complete.
Salos Dafee, windy old f**t today.