I don't know the specific procedures at the airport in Casablanca, but I assume they're similar to arriving by ferry. I'd certainly ask Air Canada, since they'll want to make sure you're able to get your bike released. On the other hand, watch out for personnel who so much want to give you answers that they'll make something up rather than admit they don't know.

General requirements entering Morocco: the bike ownership should be in your name, and you should carry all original ownership docs. You'll need to purchase insurance valid in Morocco, which is sometimes included on an EU green card, sometimes not. Since you'll need a green card anyway, best look into this. If it's not included, purchase locally (at significant expense--I recollect about a hundred euros per month). That's about it. The Moroccan government is overly fond of its procedures and paperwork, so expect a bit of time-consuming fussing around once on the ground.

Watch out for radar traps on expressways, and carry a supply of fiches if heading south along the coast. That aside, don't fret--it's not so different from riding around at home, although cheaper, friendlier, and significantly more fun (sez I).

Oh, and when asking such questions it's sometimes helpful to give your nationality, since some rules differ depending on your passport.

Hope that's helpful.

Mark