On my 01 Superglide I get a shake in the frontend above 90 mph. The handling is fine at lower speeds. I had my dealership check the neck bearings,they said they were fine.I've tried different tire pressures.I run 40psi front and rear now,which seemed to lessen the problem. Do I need a steering stabilizer like I've seen on sport bikes? Does it have anything to do with only having 28 degrees of rake?I don't know what the trail is. Anyone else with similar problems? Thanks for the help!!