When I bought the bike from the previous owner it had a relatively newer tire on it. After riding it another 2k miles I thought I had a bad wheel bearing due to vib's and humming when leaning the bike and a wobble when taking turns at freeways speeds. I replaced the tires with new Dunlop Elite3's, everything has been fine.

Now:
2k miles since the tire change I am noticing the rear tire starting to cup again, and high speed wobble in turns has came back... (38psi front, 40psi rear)

Could the front forks and rear shock settings be causing this condition, or my riding habits? Previous owner setup the bikes suspension and had no problems, I am probably at least 50lbs heavier, and additional gear. Bike is about an inch or inch and a half lower than a FLHX.