This is the factory 450 that Ben Watson will make his MXGP debut on, alongside team-mates Jeremy Seewer and Glenn Coldenhoff.
Outwardly it looks virtually identical to the 2020 models, apart from an obvious swap from SBS to Braking brake products.
Yamaha says its YZ450FM has secret internals with extra attention being paid to certain parts such as the cams and piston. It also features a completely reworked clutch, a one of a kind four-speed factory gearbox, tailor made radiators and unique radiator caps that keep the engine cool even at top speeds.
The 250 is all-new for 2021, with a chassis and suspension mods, as well as an all-new motor. This is the bike that will be ridden by Jago Geerts, who this has has gone back from his No.193 to No.93, which was his amateur number.