May 10, 2021—The 2021 AMA Supercross Championship closed out the season in the 250SX class with the Dave Coombs Sr. 250SX East/West Showdown in Salt Lake City, Utah, USA. Monster Energy Star Yamaha Racing 250 Team riders Colt Nichols in the East division and Justin Cooper in the West division were both able to secure their first-ever championship wins on the YZ250F. This is the first time a Yamaha team has won both the East and West titles in a single season and it also marks four straight championship titles for Yamaha in the 250SX West division, following Aaron Plessinger in 2018 and Dylan Ferrandis in 2019 and 2020.