the first four points are good. The rear wheel bearings wear out from the wrong spacer because roller bearings cannot tolerate side loads .
AFA greasing the front joint on a red frame still in the bike ? Post a Youtube video along w/the adapter .I wanna see it !
The battery ground to engine , you can use Caig De-oxit , Vaseline , grease or whatever you want along w/one or more shakeproof washers to verify a good ground . If this bike is gonna be down a little while , have someone make a larger diameter cable . These factory cables are Mickey Mouse as it is.