got the BB lit installed & need help

is that just the part number of the kit cause i bought a vito's jet kit for a stock carb and i think that was the part number of the kit if so it will contain a bunch of different main a pilot and a needle but everyone says to stick with the stock needle caust the vito's needle has to much taper and is hard to dial in
 
you always want to start with the biggest jet and work down progressivly leaning it out till it stops gaining power than go up one from that point just for safety