Throughout the Sepang Test, Joan Mir (Repsol Honda Team) was lapping with two RC213Vs in his box. At one stage, teammate Marc Marquez had four, with one of them being a new, experimental bike. This understandably caught a lot of attention. Simplified, the big differences were the bike had the 2021 aero package that Marquez finished the season with, and it also had a different aluminium swingarm.