Hello,

Does anyone know the real difference between the A(#1-3) and B(#2-4) carb insulators on the NC23? I pulled my carbs off to overhaul and noticed someone installed cylinders 3-4 carb boots wrong so my order goes A,B,B,A. It seemed to be working that way though, unless I'm missing something. The main reason I ask is all of them could use a replacing, yet I can't seem to find the A insulator anywhere online, but the B insulator is available on a couple sites.

Thanks a lot!
Chase

From what i can see on the fiche it goes A,B,A,B fom left to right but what the differences are i have know idea

Could it be something to do with the position needed for the metal strap screws to exit? maybe they have to be in a certain position? Im just guessing as I dont know.

when I replaced mine, there appeared to be no difference what so ever....? replaced all four with no problems