The first objective for Yamaha in 2019 is to get the engine choice right, and not to make the same mistake as 2018. Two 2019 spec engines were tested by both Valentino Rossi (Yamaha Factory Racing) and teammate Maverick Viñales, with the duo both agreeing there is a clear choice. However, in Rossi’s opinion, Yamaha have plenty of work to do “in all areas” over the winter if they are to challenge the likes of Ducati, Honda and Suzuki in 2019. Viñales has been the happier of the two in the initial tests, the Spaniard finishing P1 in Valencia and P4 overall in Jerez, but he also acknowledged there is work to do over the winter – mainly on the traction and chassis. What will Yamaha bring to Sepang?