As you have probably discovered from looking at the Registrar of Imported Vehicles website, it will be quite a PITA to import the bike to Canada even if your only objective is to plate the bike in Canada.
Have you considered simply plating (and insuring) the bike in the state that you purchase it in? I am quite certain that the dealer who sells you the motorcycle would be willing to list his business address as the 'address of record' for you. In other words, the bike gets registered to "Andy Smith, KTR motorcycle dealer, 123 main street, sumstate, USA". Generally speaking, no-one cares at all what the nationality, citizenship, etc. of a person registering a vehicle is. Where I live (BC, Canada), Osama Bin Laden could buy and plate a vehicle, no-one would ask any questions. There is no prerequsite that you have to have a driver licence to own a vehicle. As long as you are plating the thing in the same state or province as you buy it in, it is a very routine exercise, the motor vehicle dealer usually does it for you.
Once it is plated, you can then get insurance. I don't think it would make any difference at all to you - as you travel - whether the bike was plated in Canada, the USA, the UK, or any other country in the world.