I'm with you on that. I'm wondering if a Honda vacuum pump might have a different spring rate than a China vacuum pump that would allow high RPM fuel flow. It's only a theory.
For now, have you considered putting the stock pump back in, to confirm that nothing else is causing the symptom?
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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