United struck twice in the opening quarter of the game, first through Dan Gore, who found the net with a smartly taken left-foot finish after 12 minutes.
Sam Mather then doubled our lead 10 minutes later, finishing off a fluid move in an action-packed start in West Yorkshire.
Goalkeeper Eric Hanbury, making his Under-18s debut, was called upon throughout proceedings and did well to keep his clean sheet intact, denying Keelan Carole and then Mitch Picksley on separate occasions, before Kobbie Mainoo rounded off proceedings in the sixth minute of stoppage time, following up on Manni Norkett’s initial effort, which was saved by Harry Christy.