Already widely-regarded as the most competitive 250 four-stroke model on the market, the 2024 Yamaha YZ250F arrives as a new generation model and with a high benchmark to surpass. With many changes centred around the frame and chassis, plus a number of upgrades to the engine and Yamaha Power Tuner, it may be a case of the best getting even better. MotoOnline was on location at the US press introduction this week, split between a presentation at the Los Angeles Memorial Coliseum, as well as the on-track component with Caleb Tennant at Perris Raceway for this Overview on our first test.