I was absolutely certain you could not buy a bike in the USA to take back to Canada, but didn't want to rain on your parage until checked on it.
Even back pre-9/11, to ship my bike to Europe to ride for a month, I had to file 5 extra pages with customs saying I was not exporting it, and would be bringing it back in exactly the same state it was when it went over.
So no ferrying parts over either.
Since 9/11 you can forget it. Homeland Security has made sweeping changes since then. Used to be, I could tell a veteran who had a felony after getting out, to get a CDL-A commercial driving license, and they could go drive heavy truck for the mining companies in the region.
Now, trucking companies and everyone else have to do background check to date of birth, and anything felony or DUI related means you cannot drive. Well, you can, if someone can afford to insure you. Nobody can or will.
Same with selling vehicles, same as 1992 when I went to Europe, but now if a US dealer sneaks an export deal under the table, they can go to prison for 5 years. Not going to happen. And Kawasaki won't let a US dealer export openly to Canada, for instance, even if the dealer is willing to pay huge export tariffs (taxes).
Living the Gypsy Life