Hello so I have ran into a problem and I can't find the answer. I'm working on a 67 flh electra glide that is a basket case. I know it has a zenith carb on it but I'm not sure if that's stock or not. I also don't know how to find out if it's a 38 or a 40 any help would be greatly appreciated. Thanks

 

I had one on my 1975 FX Shovelhead. It came with it from the factory and was a 38mm as I recall.

 

Thank you