Does anyone know how to improve the response of the Fuji XCR 440 engine? With my XC700 I've been able to install a boost bottle, vforce reeds, gearing and clutching, but with the fuji 440 its not a case reed engine, and there is no port on the carb boots for a boost bottle. I've noticed that on the bottom end of the throttle the engine is very boggy and feels very rich, it does open up to some amazing power on top, but I would like to get a little more crispness on the bottom. Has anyone had success clutching their 440 engines? As of right now the 440 is running the factory carb settins which are a 240 main with the needle in the #3 position. Any info would help. Thanks.