hi new to this site so please bear with me, i have been riding for over 20yrs. i rode a 77 shovelhead for 19yrs before i bought the streetglide so i do know about an hd vibration. my problem is i was on the bike for about an hr and was cruising around 75-80? and it just felt like something maybe moved, i don't know it is just ever so slight,but it is still there, the dealer thinks i'm crazy but they did tighten my front engine mount and aired up my tires ,but i know it's there can anyone please help me, thanks kycoot