Wales scored 10 tries as they kicked off their IRB Under-21 World Championship campaign by hammering Georgia in Issoire, France.
But in the searing heat of the Auvergne region, the young Dragons made heavy weather of it against the minnows.
Tries from wings Aaron Bramwell and Chris clayton, centre Tom Riley and hooker Daniel George put Wales 28-6 up.
Dafydd Hewitt, George, Will Jones, Roger Davies and Bramwell added further scores, Aled Thomas converting all 10.
Wales Under-21: Roger Davies (Bridgend); Chris Clayton (Blues), Dafydd Hewitt (Blues, capt), Tom Riley (Blues), Aaron Bramwell (Ospreys); Aled Thomas (Dragons), Martin Roberts (Ospreys); Rhys Gill (Blues), Daniel George (Scarlets), Craig Mitchell (Ospreys), Chris Dicomidis (Blues), Dominic Day (Scarlets), Rob McCusker (Scarlets), Rhys Shellard (Blues), Adam Powell (Blues).
Replacements: Phil Osbourne (Dragons), Ed Shervington (Ospreys), Richard Cornock (Dragons), Will Jones (Dragons), Craig Everett (Worcester), Nicky Griffiths, Craig Evans (Scarlets).