My question is why would you even risk it? , is it too good of a deal to pass up? . He looks corporative because he wants to sell you a bike get the money while still keeping the bike in his name.
My man his tone can change anytime, what would you do if he refuses to transfer? do you want to deal with all the legal hassle to try and get your money back.
What if you want to sell the bike before the said smart card arrives , what would you do then?
What if God forbid anything happens to this gentleman what would become of your money then? would his family honor your deal then and would you be willing to work out the legal issues?
I'd say just get the bike with all the paperwork transfer to your name and have peace of mind even if you have to spend a bit more.