The 2027 YZ250F receives an all-new liquid-cooled, DOHC, 4-valve, fuel-injected 250cc powerplant revised to increase power across the entire range with a rev limit 700 rpm higher than before. Despite the increase in power, a revised air cleaner and exhaust system reduces overall noise for FIM/AMA compliance, with a tuned exhaust note that's pleasing to the ear.