His success in the Thailand Talent Cup marked a significant milestone, paving the way for him to join the Asia Talent Cup. There, he achieved victories and podium finishes before progressing to the Asia Road Race Championship. From 2018 to 2023, Tatchakorn Buasri competed in the Moto3 category in the JuniorGP series. In 2022, he clinched two podiums, including a victory, setting the stage for the 2023 season with a Top 3 finish in Portimão. From 2020 to 2022, he also competed in the Red Bull MotoGP Rookies Cup, notching a win and two additional podiums. After participating in four events as a 'wildcard,' Tatchakorn Buasri embarked on his first full season as a regular Grand Prix rider in 2024 with Honda Team Asia, securing a best finish of 15th.

Heading into 2025, the Thai rider will be determined to take a further step as he looks to build on his experience in his second full season in the Moto3 class.