Hey bud, It looks like you need a longer servo horn......And take alook at pic #3 your horn might need to be in that position when your servo is at nutral (with the longer horn)......Also not all carb's have the same through rate from open to close....It looks like you have an O.S. there (lookin at the dust boot).....I have a couple of .21's an O.S. and a Picco, The Picco has a shorter through than the O.S. BTW Welcome to RCU......... :rainfro: