Clutching will give you some additional top end you’re looking for. I can tell you there’s nothing like the sound of a triple, but, you will get an awful drone that can become tiring after a while of running at high speeds with triple pipes. There’s also a good chance of cylinder burn down if not tuned correctly to the pipes. The XLT is a good motor if maintenance is done and the engine is left close to stock. Personally I don’t think you are going to build much of a racer out of an Indy…..unless you at least start with an XCR.. B.