Let me start this by saying that I'm a huge advocate for proper grounds. I've fixed many an odd problem on cars, boats and RV's because of bad grounds. My Dad was a GM service rep ,and in 1968 found out why the new body style GTO's with automatic floor shifts were all seizing the shifter cables. No ground strap to the body,and ground was trying to run through the shift cable. I too was wondering about the Banshee electrical system and proper grounding since I just installed my motor in a freshly painted frame. I did "bare metal" all the mounting points of all mounts. But after buyiing and using 4 new damper shims, I couldn't see how the motor would possibly touch the frame- metal to metal. Not that the Yamaha engineers purposely meant to isolate the two, but they certainly didn't do the opposite either. Anyway, tonight I removed my chain,clutch cable,lower exhaust springs, exhaust brackets, and disconnected my wiring, Ohm meter proved it- totally isolated. I can't believe these don't come with a ground strap from the factory.