Image: Foremost Media.

Motorcycling Australia (MA) has opted to remove the Mectronik YMER6WSS Yamaha R6 ECU from homologation in the Australian Supersport Championship during the middle stages of the 2024 season.

The Mectronik ECU has been used by two-time Australian Supersport champion Tom Toparis to date this year with the high-profile Stop and Seal team, but a transition to Yamaha’s homologated YEC ECU option is all but certain under MA’s ruling.

Toparis – winner of back to-back ASBK Supersport crowns in 2019 and 2020 – skipped Phillip Island’s opening round of the 2024 Australian Superbike Championship (ASBK) series while lining up as a wildcard in the Supersport World Championship.

Since then he has largely proven the class of the domestic 600cc field once again by winning Sydney Motorsport Park and Queensland Raceway, climbing to sixth in the standings and now 33 points outside of the series lead. The Mectronik YMER6WSS ECU had been allowed on R6 machinery from as far back as 2017, but that has officially been outlawed, effectively immediately.

“The Rules and Technical Committee in consultation with the Australian Road Race Commission have decided to rescind the homologation of the Mektronic [sic] YMER6WSS Yamaha R6 ECU and remove it from the approved Manufacturers Nominated Kit ECU list,” an information bulletin from Motorcycling Australia (MA) confirmed.

“It was determined by the Rules and Technical Committee that the ECU in question has features that provide an advantage and in the interest of fair and even competition that the ability to use this ECU has been removed.”

It is currently Phillip Island round winner Jonathan Nahlous who leads the 2024 championship, 27 points clear of Olly Simpson following three rounds. Nine of the top 10 bikes in the standings are Yamaha-mounted, outside of Honda rider Marcos Hamod in seventh position.