G'day guys, i'm wondering if someone can explain to me the CR500 jetting specs i obtained from the Pro Circuit website that i have highlighted? Are the details listed beside CR500 the stock jetting specs? and the details beside Pro Circuit the jetting specs if a pro circuit pipe is applied to the bike? What does STD mean? Standard? What does POS mean? and which screw are they referring to for the 1 1/2? Please forgive my ignorance, i have never gotten into the jetting side of things. Thanks in advance. Andy.