Feel a vibration in handlebars during deceleration and part throttle. Not always there. Kind of feels like wheel bearings, but I really think it's engine related. I've only had the bike a few months and pretty sure it been this way since purchase. It's a 2003 Dyna WG. Has auto primary tensioner and geared cams. I'm a bit worried it may be the cam gears, as I don't know if crankshaft runout was checked before the geared cams were installed. Any thoughts ?