Lock Scott Andrews replaces fellow Dragon Joe Davies, Scott Matthews comes in on the openside for Will Boyde, and Ashley Evans returns to the starting XV in place of left wing Joshua Adams. In addition, Ben Leung comes onto the bench for Callum Lewis who picked up an ankle injury in the 13-3 victory on Tuesday.
Although Wales beat Grand Slam winners France in their final Pool match, it wasn't enough to overturn their defeat to Ireland and make it through to the top four, so Wales face France again in the 6th place semi-final.
Hayward said, "Scott Andrews and Scott Matthews will be fresher having not played as much rugby as Joe (Davies) and Will Boyde in this tournament. As far as Ashley is concerned, we feel he can add an extra dimension in his more usual position of wing."
The former Wales outside half is confident in the ability of the Welsh youngsters to rise to the French challenge again on Sunday.
"We managed to win on Tuesday without much territory or possession, so if we can improve on those fronts, and play to our strengths, there's no reason we can't repeat the feat.
"France are excellent at the line-out, that is an area we must target in order to both deprive France of good quality ball and to increase our own attacking opportunities. We have to be more accurate in everything we do.”
Wales Under 20 v France (ECOLight Stadium, Pukekohe, Sunday 15 June, 6.35am UK time, shown as live at 10pm on S4C):
Dafydd Howells (Ospreys); Tyler Morgan (Dragons), Steffan Hughes (capt, Scarlets), Jack Dixon (Dragons), Ashley Evans (Ospreys); Angus O'Brien (Dragons), Tom Williams (Blues); Nicky Smith (Ospreys), Elliot Dee (Dragons), Nicky Thomas (Ospreys), Scott Andrews (Dragons), Rory Thornton (Ospreys), Olly Cracknell (RGC), Scott Matthews (Dragons), James Benjamin (Dragons).
Replacements; Scott Otten (Ospreys), Luke Garrett (Dragons), Ben Leung (Scarlets), Ben Roach (Blues), Will Boyde (Carmarthen), Luc Jones (Dragons), Ethan Davies (Dragons), Harri Evans (RGC).
