I have a 01 Sprint and around 75 mph there is a buzz in the bars.I can't ride 40 miles without my hands getting numb. I have the standard grips on there that came stock, but i am wanting to get foam grips. I have heated grips so i dont know if that will work. Would i have to disconnect the heated grips somewhere? Because the wrap has stuck to the inside of the grip. Has anybody had this problem? The tires i have now are 5500 miles old and i have new avons i am putting on this weekend. Hopefully that will fix the buzz If not i thought of putting a couple of rubber o-rings under each handlebar where they mount to the triple tree. Any suggestions would greatly be appreciated . I am taking trip up to North Carolina to the Blue Ridge Parkway and Deals Gap etc.. So i need to get this problem fixed as soon as possible.