to start and idle fuel get sucked in via the upper idle drip chamber. Fuel reaches it via a very narrow side channel from the bowl to the top just beind the needle. Thee LS needle allows fuel to reach the uper drip chamber and out 3 small holes while the throtlle plate is mostly closed at START and cam follower sits in from og the mark on the cam. check and recheck and blow out the side channel make certain fuel does reach the top drip chamber and snug up the needle collar on the neelde packing.
Joining AOMCI has priviledges 🙂