I have a brand new Yuminashi ECU for the Honda Grom...fits all years! Plug and play for OG Grom and re pin four wires for SF Grom.
I never installed this unit, it came without instructions, but per the website it detailed which pins need swapping...I'm not up for the re pin task and am going to purchase a different setup. If you have an OG Grom no real brain work, plug and play!
Asking $110 shipped to lower 48.