Waxstat jets are easliy identifiable by the large alloy housing rather than the plastic end holding the fuel pipe. Fitted to HS4 carbs only the HS6 had its own LZX1119
Jet tube for twin SU carb: If you have a single carb, use AUD9098A although some people interchange with this one. This is for the left hand or front carb and identified by a green band. 20 degree float angle.