Siphelele Mthembu scored the only goal of the game in the dying seconds of the first half, with Dikwena stretching their unbeaten start to the season to seven matches in all competitions.
It was Mthembu's fourth goal in six matches, and he put in another excellent performance in the lone striker role.
AmaTuks goalkeeper Washington Arubi was forced into a number of saves in the first half, keeping out Mthembu and Mogakolodi Ngele, who came back into the side after missing the 0-0 draw at Free State Stars on the weekend.
But he was beaten in injury-time in the first half, Vuyo Mere feeding Mthembu in the area and the hungry striker slotting the ball home.
The goal would have drastically changed AmaTuks coach Steve Barker’s half-time teamtalk, but it was much of the same after the break with Mthembu and Robert Ng’ambi going close for the home side.
Obadiah Tarumbwa and Khethu Zwane had good opportunities for the visitors and may have stolen a point, but Dikwena held on for a deserved victory.
Next up for Stars is a big away clash at Kaizer Chiefs on Saturday night, while AmaTuks host a battling Golden Arrows.