My canadian 1980 XS400 special has a 271 y-4 needle jet, and an adjustable 5gz15 needle. I am trying to set up the jetting for my pod filters and am ordering 45 and 47.5 pilots, and 137.5, 140 and 142.5 mains. I would like to order the right needle and needle jet, but I can't figure out which...