Re: Can't remove bar end...
I had a similar problem on my 08 CBR 1000RR when I wanted o put R&G Racing bar ends on it. Basically the left side would not come off, and then it started spinning in the clip on.
So what I did was, take a medium sized set of vice grips and clamp it to the bar end, I'm only assuming your bike has enough bar end to grip onto. Once you have it clamped on there take a screw driver that fits the screw perfectly, and by perfectly I mean doesnt have any play at all, I had access to a full mechanics set of tools so I really didnt pay attention to what size it really was.
Once I did all this I had a friend hold the vice grip while I took a rubber mallet and tapped the end of the screw driver while turning it. The screw came out and there was much rejoicing.
The only problems I see with this is that the screw head looked like crap, and the bar end itself was scarred from the vice grip. I didnt care since I was replacing them with the R&G ones. So I would suggest going out and getting some after market ends and just doing it this way.