Taffy the blue needle is for a 06 KTM 525 the setting recomended for that bike is 3rd clip position, I run with 5th clip!.......previously ran 40 pilot 75paj OBEKR 5th clip 182 main ran well but had more of a hit in the mid range....JD needle is smoother and stronger all the way through the rev range,not saying this is the best setup but its the best Ive got so far