Monkey King ran the 2600m yesterday in 3:15.7, which compared with the race and track record of 3.13.4 set by Cullen's Creek last year.
Monkey King ran his last 800m in 56.7 and 400 in 27.9.
"I couldn't be more happy with him. He is a different horse this time in. I just don't know what went wrong with him in the autumn," May said.
Power Of Tara, a stablemate of Monkey King, started favourite yesterday but dropped out to ninth after being prominent at the 800m.
Second Wind, who had not raced for 10 months, ran on for second after trailing close to the pace. He finished 1 lengths clear of of Rangataua Ray, who led out then trailed when Monkey King went to the front.
Franco Emirate and Smiling Shard, Cup candidates, are progressing well for a return to resume racing after workout wins on Saturday.
Franco Emirate recorded 3:19.1 for 2600m after starting from 70m at Motukarara. He won by two lengths from Call Me Danny with a length to the other runner, Indrah. Trainer Jim Curtin said he was pleased with the effort and that Franco Emirate wold resume at Addington on September 30.
Smiling Shard ran 3:25.6, the last 800m in 56.9 at Rangiora after starting from 40m. He won by half a head from My Man Dan. Smiling Shard is due to resume at Addington on October 14.