That yak will fit in a checked bag, but too large for carry on at 57 inches.
If your authorities will allow it in with you in checked luggage I would check it and bring it back. Even if that means you leave most of your clothes behind - because clothes are easier for you to replace than purchase this yak in your home country?
That is presuming you utilize only a single checked bag. If you can afford two, then the second bag will hold your new yak.
