I don't know the process of bringing it into MI from ON but I'll tell you what we have to do to bring it from MI into ON.
Example:
Ski purchased for $4000 USD Sale Price
$4000
x 1.05237 exchange rate
+ 195 RIV FEE
x 1.06 GST
x 1.09 Duty (country of origin for Yamaha is Japan, not NAFTA approved)
Make sure you have bill of sale (detailed), you may need a recall letter from Yamaha, Get a current registration or title (if avaliable) from the seller.
I don't think there is an RIV fee on skis
You should be good to go.
My guess is you'll pay your state sales tax, 9% Duty, and make money on your exchange rate approx 5%.
You may not have a RIV fee (this is a Canadian thing) and just another $195 we grease the government with.
Leave our superjets alone... Take all the Kawis and couches you can find.