BT, I'm with ya on this one... I just went 183 miles per hour today. GPS recorded... so it was ACTUAL speed. The speedometer read 185mph a looong time before I actually got to 183mph Actual. it was like 160mph GPS when the Speedo was reading 185.
I'm with you about the speed though. IT IS NOT EASY to go THAT FAST. I can get the needle to read 185 relatively easy. BUT AFTER THAT, EVERY SECOND GETS EXPONENTIALLY HARDER. It get difficult to breathe, you start getting really sore, you can't see well AT ALL, and it takes every ounce of strength to stay in your lane, because if you leave your lane, you DIE. that simple. NO amount of gear will help you at 180 mph. (I dunno if you guys saw the earlier post about the guy who crashed in the Gixxer 1000 at about 170mph... he got torn to pieces). As for the helmet, when it comes to going fast, I don't do it for safetly because I know it will crack open the second I hit the ground... I do it for comfort. Any little piece of debris, or bug that hits you at 180mph will MESS YOU UP. I looked at my helmet after the 183mph run, and I thanked God that I had it on. The thing was covered in bugs.
Anyways, in my opinion it is IMPOSSIBLE to go past 160mph without a helmet... I can't see how a person would even be able to keep their eyes open... I have a hard time riding with my visor open after about 40 mph...