Hi everyone. I have read alot of posts through this forum as well as other forums regarding my condition I am observing on my bike. I still have a concern ( which may be normal) regarding my 5th gear. From what I have heard, 1st and 5th gear are straight cut gears on my six speed tranny, as to the other gears being helical cut. I have kind of always noticed a heavier vibration in 5th gear at 60mph while pulling towards 70 to get into sixth gear. It feels like the lower end is going to give way (box of rocks grinding feeling). Keep in mind, this bike has less than 3k on it. All liquids were changed to synthetics at her first service. I know there are not alot of miles on the bike for its year, but I was very sick shortly after I purchased the bike, so I am making up for it now that I am healthy again. I just put V&H BSS exhaust, Big Sucker, and a TFI unit on the bike. The bike is not stuttering, backfiring, and performs very smoothly at idle also. Is this a normal thing for this year bike with this type tranny? I know harleys always have had a vibration. I guess I am not used to the situation at hand. Once I am in sixth gear, the rocks seem to go away ( for lack of better words). Like I said before, I have read alot about this "so called" issue. But I wanted to ask the good people on this forum if this is a normal thing or a major issue (which I do not believe it is)? I like to sleep comfortable if you know what i mean. Thank you to all than can shed some insight or help. Just want to be safe on this situation. Thanks again.