Triumph Daytona 675/R & 765 Moto2 H2O Performance Water & Oil Radiator KitH2O Oversized Water Radiator and Oil Radiator Kit. The more horsepower an engine creates the more heat it creates. Once an engine reaches around 85degC (185degF) you start loosing power and at about 118degC (244,4degF) you could loose 6 7 HP and ultimately risks the threat of serious damage. Cooling problems are a major cause of failures in all types of racing: the radiator is important to the performance and longevity of your racing engine. New