USLC has an ongoing contract with Yamaha. They have greatly toyed with cooling the FJ with water as it is in the Roadster and dirt car. It in my opinion is not a good fit in the Legend car. If and when the FJ1250 becomes obsolete there could be a change, until then its not going to happen. Its not because they want your motor to blow or be rebuilt more often. it is because this is what they started with and the motor and its parts as a 1250 are available to USLC, there techs, tooling and knowledge is invested toward the 1250. It would be huge undertaking to change motors, until it is a must it will not happen.