It is one thing testing resistance & another load testing !
The grounds you checked check again with the bike running with the scope as a DMM. (black to ground (Batt -)red to ground being tested))
Does the dash receive the voltage from the ECU for the engine via CAN ?
Grab a CAN capture anyway & post it on here lets have a looksy
Just so you know i am not a bike guru but a few of us may be able to help with testing methods & possible results/captures.
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