Word of New Zealand's KZ2-based ProKart Series has spread across the Tasman, with two top drivers from the Australian Karting Championship set to compete in Te Puke this weekend.

Townsville's Josh Smith and Adelaide's Jonathon Mangos will compete in round four of the NZ Rotax Max Challenge and ProKart Series at Fagan's Valley Raceway.

Josh Smith will take on the Fagan's Valley Raceway track this weekend. Photo: Facebook.

For Smith, it is a return bout, after finishing second on debut at the third round of the series in Tokoroa last month.

But for Mangos the trip to the KartSport Bay of Plenty club's track will be an all-new experience.

In Australia the pair are run by former racer Tom Williamson, who has first-hand experience of racing here having won the New Zealand 125cc Rotax Max Heavy title in 2007.

Williamson suggested Smith should cross the Tasman for the Tokoroa round and was so impressed with the results, he recommended Mangos join him in Te Puke this weekend.

The pair will be run by Auckland-based international Daniel Bray, who says Williamson has made a canny decision.

'Josh and Jonathan are both racing KZ2 in Australia this year,” says Daniel, 'and in terms of seat time against quality drivers, you simply can't beat our series.”

It's certainly competitive, with three different winners in the premier Cable Systems-backed KZ2 class in the three rounds.

Only five points separate series' leader Graeme Smyth (Auckland) and former New Zealand champ Ryan Grant and current South Island class champion Chris Cox, who are currently tied in second.

There has also been a different winner at each round in the KZ Masters and Vortex Mini ROK support classes.

In the Masters, defending title holder Tom Curran (Hawke's Bay) won in Rotorua, but Mark Wheeler won the Hawke's Bay leg and fellow Aucklander Jared Mackenzie claimed top spot in Tokoroa.

In the Vortex Mini ROK junior support class, Joshua Parkinson (Auckland) won the first round, Connor Davison (Hamilton) the second and Fynn Osborne, also from Hamilton, won in Tokoroa.

Class National Schools' champion Ryan Wood, from Wellington, is the current class points leader.

Only in the KZ2 Restricted class has one driver made every post a winning one so far. That honour falls to defending title holder Garry Cullum.

This year's ProKart Series is again twinned with the New Zealand Rotax Max Challenge, with more than 100 karters from as far afield as Dunedin and Whangarei making the trip.