2021 MotoAmerica Superstock 1000 Championship
The 2021 MotoAmerica Superstock 1000 Championship season was the 7th season of the Stock 1000 class of motorcycle racing within the MotoAmerica series. Cameron Petersen entered the season as the defending champion, but vacated the class to race for the M4 ECSTAR Suzuki Team in the MotoAmerica Superbike class in 2021.