I Want to share my experience about the handlebars BUSSY and VIBRATIONS, had that problem since I bought the bike and after 38k get worse, did everything trying to fix the problem but the only thing that really fix it was adjusting the Steering Stem Nut ,even that when you check for play and seem to be ok it might be a little loose and that is enough to produce that buzzing in the handlebars , now my numbness problem is gone, bike is lot better than when new, Now I believe those who say they do not have that problem on their bikes