I did, after examining the ground to the frame I found little to no electrical attachment from the frame to the body,, so I would run a ground from the frame to the body.. at least close to the antenna mount if not in a few places. Also the ground strap that attaches the engine to the frame is very thin and you can see through the ground braid. This is probably why alot of HAM's running higher power have to ground the engine to the frame also.