I have imported 2 bikes from canada to the US. one new Guzzi qouta, used a broker didnt really need them though. went solo on a KLR650 ( for sale by the way, too many bikes in the garage).
What customs wants to see are DOT/EPA stickers, documentation. the Quota was new and I used a border broker ( $100 i think) . the customs inspector for the KLR just want to see the EPA/DOT stickers, most late model MC in canada comply. My KLR did not have this but that another story.
in theory it would be possible to get the above info from the Mfr, right....they do not care and prefer no cross shipping.
Since the US dollar has tanked deals in canada are far and few between , I have heard of Canadians buying MC in the US. ( hey I could be wrong ) .
after you get your bike in the US you need to follow your states laws re license, washington state no longer inspects out of state vehicles ( we jus' po' folk )
Keep in mind if the bike you import to the US is over 700cc you will have to pay 2% duty unless its a harley. this is a leftover tax from the Ronnie Reagan-Harley-lovefest-alliance. Great because harley makes crap, I have to pay more for my bikes. I guess this lets harley afford to have Elton john play at the love fest 100' birthday......
your results may vary