Hi I’m new to the forums. I have a 2008 400ex. I already have a motoworks sr4 slip on pipe, big gun header and an uni air filter. I am 100 ft above sea level. Weather is about 60F. I do not know which jet kit to order and what jets to run. I was looking at a 6sigma jet kit. Are those any good? I was thinking of a 42 pilot and 165 main. I’m not sure what to do about the needle and air fuel mixture screw?