Moimoi lasted just six minutes after coming on for McKendry but he is expected to be available for the Kiwis' final round-robin match against England in Hull next Saturday.
With the Kangaroos beating the Kiwis 26-12 last week and England 36-20 today, the England-New Zealand encounter at KC Stadium will be a sudden-death game to find the Australians' opponents in the final at Elland Road on November 19.
Playing at the magnificent Wembley Stadium in front of a crowd which later swelled to more than 42,000, the Kiwis were clinical early on as they played to the game plan set for them.
Captain Benji Marshall laid on the first try after only four minutes, punching a kick through the Welsh line with impressive winger Jason Nightingale timing his chase to perfection to gather the ball for his 10th try in 14 tests.
And Marshall was the architect again nine minutes later when he laid on a nice inside pass for fullback Kevin Locke to cut through for his second test try.
When hooker Thomas Leuluai created the first of two tries for second rower Sika Manu in the 20th minute, the score could have blown out dramatically. Instead the points production slowed up although there were two more smart tries for the Kiwis before the break, both with the Marshall stamp on them.
His 31st minute bomb was tapped back by the chasing Locke, debutant Elijah Taylor collecting and sweeping the ball to his right for Manu to score his second try.
Right on halftime, winger Gerard Beale had his first test try, the result of Marshall shaping to go to the open but pivoting to raid down the short side.
He put centre Alex Glenn through a hole and all he needed to do was to shift the ball to Beale on the outside for another nice try.
With McKendry gone after 54 minutes, the Kiwis were down on troops and it took until the 62nd minute before they crossed again, as Beale was handed his second courtesy of a Kieran Foran pass.
Leading 30-0 with 18 minutes to play there was ample time for the Kiwis to inflict further pain but the gallant Welsh refused to yield.
Only once more, and then as late as the 76th minute, did they open up when Leuluai, named the man of the match, skipped through the Welsh line and gifted a try for utility Nathan Fien.
By then the Kiwis had used up all 12 interchanges with Glenn taken off in the 70th minute with a slight shoulder injury.
While McKendry's injury was a setback, there were some encouraging signs, not least on defence with the Kiwis missing just 16 tackles and leaking only one line break.
Adam Blair's return after a long enforced break was also impressive. He played all but four minutes of the match, carried the ball 18 times for 128 metres - the most by any of the forwards - and made 28 tackles.
