The eighth annual event kicked off racing for 2017 at Pinjar Park Speedway, with fellow West Australians Daniel Winchester (second) and Kale Ballantyne joining Heeps on the podium.
The final was declared on the last lap as visiting British rider Ben Morley, who was coming third, fell.
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Other strong performers were Matt Marson, who was one-point short of making the final, Doug Scoble and UK’s Ellis Perks.
Former state champion Leigh Boujos and Des Heys also made their return at the race.
In the sidecars, Ash Brown celebrated his birthday with a victory alongside Tony Shield.
Clayton Mills and Steve McQueen took second while Russell Mitchell and Andy Gajek, who started the final with a 15m handicap, came third. In the 125cc junior solos, Declan Killeen made a welcome return to his best form, going unbeaten in the heats before taking out the win in the final ahead of Chris Bogdan and his younger brother Luke Killeen.
Only two junior sidecar teams took to the track, with Jake Harvey and Tyler Solomon winning all four races and Fewster brothers Jack and Adam being excluded in three.