It may be a stupid question, but what's the difference between the four? Need a "B" but am having trouble locating one specifically... Does it matter? Are they different? I can find no definitive answer in the parts, shop, or owners manuals... Anybody?

 

Does not matter which one you get they're all gonna work. Chances are the D is the only one that's gonna be available.

Sometimes after a part comes out I think Harley makes some minute change to it and the new part gets a letter at the end. First an A then a B etc ...

Like I said they should all fit a choke cable is a choke cable