Mishimoto has developed a dirt bike radiator for the Yamaha YZ250F. Upgrade your stock Yamaha YZ250F radiator with a Mishimoto aluminium dirt bike radiator to receive 30 per cent greater cooling efficiency. All Mishimoto powersports radiators are made with aircraft quality brazed aluminium and are precision tig welded for extreme durability. The Yamaha YZ250F dirt bike radiator is designed as a direct OEM fit to ensure smooth installation.