Top Australian sprint cyclist Jobie Dajka reached an important milestone in the comeback from the low point of his cycling career.

The 2002 world keirin champion won his first national sprint title since 2001, beating 1km time trial specialist Shane Kelly two heats to nil in their best-of-three final.

Also on Thursday, Queensland's Meares sisters reached the sprint final and Tasmania scored a massive upset win in the 4000m teams pursuit.

This was Dajka's first national championships since last year's fall from grace, when he was kicked off the Olympic team and suspended until the start of this year for a code of conduct breach.

The South Australian denied injecting himself with vitamins during a doping inquiry and it was later proved he had lied.

"It was the biggest upset of my career and of my life to this point, I think I can definitely make myself stronger out of it, I've done it so far," he said.

"An Australian title is always good to get, especially after the year I had and especially in Adelaide as well."

But Dajka was even more concerned about beating Kelly, who is not a noted sprinter.

"I've never felt more pressure in my life, not because I was coming back in front of Adelaide, but because I was in a final against a kilo guy and I'd get a lot of crap if I lost," he joked.

Dajka rates himself about 85 per cent fit as he builds to next month's Los Angeles World Championships.

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