Ever since I got my R1, I've been having issues with my throttle hand going numb on longish rides (20+ miles). Once it goes numb, I have to wait for downhill that I can coast down so I can take my hand off the throttle and try to get the feeling back, which takes about 30 seconds. I never had this problem with any other bike. I think it's due to the unique vibrations in the bars, or maybe my grip is poor, or I'm gripping too hard? Are there vibration dampers that can go in the clipons or in place of the bar ends?