Rebuilding The Nikki Fuel Pump

12 hours ago, Vital_Parts said:

I'm interested in the answer to this as well.  Anyone break down a Atsugi pump to verify the style?

I hope I am not to late to help anyone with this. But I was about to swap the diaphram over to my old pump but noticed that the diaphram in the new pump was shaped a little different than in the ampco pump diaphram i was replacing so instead of risking a leaking pump i replaced it completely. Also if i could say to Vital Parts. The ampco pump that was originally on my 260Z did have the donut shape diaphram rod.  Although I have now put on the new pump and every thing seems to be working as it should be I am hoping I can get the repair kit for my old ampco pump with the view of putting it back on to bring it back to its original condition.   Hope this helps.  Kind regards to all zedders.