Australian Olympic kayaking champion Ken Wallace has made it back-to-back World Cup gold medals in the men's K1 500, after taking out the event in Racice, Czech Republic.

A week after surging to victory in Szeged, Hungary, Wallace led the final from start to finish.

Wallace, who won gold in the K1 500 at the Beijing Olympics, set the Czech Republic win up with a great opening 250 metres and was never headed, winning in 1:44.01.

Denmark's Rene Holten Poulsen finished second, 0.76 seconds behind Wallace, with Czech paddler Josef Dostal winning the bronze in front of his home crowd.

Fellow Australian Lachlan Tame got off to a great start, second to Wallace at the halfway point, before tapering off to finish seventh, 5.10 seconds behind his compatriot.

Tame also finished ninth in the men's K1 200 C final.

It brings Australia's medal tally to three at the second World Cup event, after Wallace won bronze in the men's K1 1000. Wallace's younger sister Bernadette also combined with Naomi Flood to win gold in the women's K2 1000.

The victory for Wallace continued his stellar start to 2013 which began at Nationals earlier in the year when he reclaimed his mantle as the nation's top men's K1 paddler, after a hard-fought victory over long-term rival Murray Stewart.

In other action in Racice, Flood and Wallace could not repeat their K2 heroics, finishing eighth in the women's K2 200 A final.

The pair finished 2.13 seconds behind Serbian sisters' Nikolina and Olivera Moldovan.