Known as a swinging needle because they sit on a spring which locates into the hat/cup end of the needle and have sideways movement. They start with part number prefix CUD for HS type carbs--NZX for HIF carbs--the earlier H and HS type were fixed sol...

Swinging type needle, usefull for 256 degree duration camshaft with standard filter, see BDK NZX8010 for K&N filter.

If you have fitted our inlet and exhaust manifolds plus an RC40 exhaust to a stadard 1275cc engine this needle in a HIF44 carb will work great if coupled with a K&N pancake filter.