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I do wonder if the starter button could be to blame?

I didn't see that relationship in the schematic but would be easy enough to try. The starter relay appears to be identical to the fuel pump relay and I have a spare.

I added a momentary switch to the white wire coming out of the rectifier like you did that grounds to the triple clamp bolt. Works great.

Thanks for the information. I'll give it a try tonight. I did ground the white/black wire off the back of the fuel pump relay which did work and allowed the bike to start but when I shut the bike off, it would take 2 minutes or so before the relay would open back up the contact correctly.

Mine looks okay, both on the rectifier and the stator end

To clarify, you ground the white wire out of the regulator using a momentary switch or a toggle switch? If a toggle switch, when do you turn it back off? Also, when you shut the bike off, can you reactivate your grounding switch and prime the pump right away again or does it take a minute for the relay to...

Keep me posted on what you find. I'm going to trace the white/black wire everywhere to make sure I don't have any issues. I can jump pin 87-31 and my bike start right up. I'll try the grounding the black/white wire as well. Maybe I can put that on a momentary switch and avoid future issues.

Did you replace the voltage rectifier? Did it solve your issue? I purchased a cheap rectifier to address the same issue and it did not solve my issue. Wondering if the rectifier I received is also bad or if I have another issue.