So I am new to riding SM and adjusting jetting based on parts used and altitude of riding. As it stands my '07 has a full Hindle exhaust on it. The previous owner partially adjusted the jetting on it however he told me he did not have the exact main jet for it. Right now it has a Mikuni 150 main and I am not sure of the pilot. He suggested I get a 145 main and a 22.5 pilot for proper tuning. But I would like to do the 3x3 so I know the jetting will change. How do I go about finding what the proper main and pilot would be for the stated mods and my current elevation of 6,000ft? And my other question is what type of Mikuni jets are they? Ive hear of three different types. Something like round, hex or allen??? Can anyone school me on it or provide me links? Im having a hard time searching for the answers because I really dont know what questions to ask. Thanks.