Aluminum Water Cooling Radiators for Yamaha YZ250F YZF250 2007-2009Fit for YAMAHA YZ 250F 2007 2009. Heavy duty 100% aluminum provides increased heat and pressure tolerance, improved heat dissipation, increased durability, and improved cooling efficiency. TIG welded to maximize strength. Radiator core is thicker than stock radiator for increased cooling and internal coolant passages are 33 percent wider for improved flow. High efficiency brazed aluminum cores, significant increase in fluid capacity. Designed as a