To add a hitch to your 2023 Jayco Whitehawk you are going to want the Curt Adjustable Trailer Hitch Receiver item # C13701. This is a universal hitch which is designed to work with box frames, c-channel frames, or i-beam frames between 18"-51" wide. There are no custom fit options.
The Curt Trailer Hitch item # C13701 has a maximum tongue weight capacity of 500 lbs which should give you plenty of capacity for not only your Vespa moped but also the rack you'll be carrying it with.
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