9411,
When I installed the SuperBars on my Blast the only thing I could see in the stock mirrors was my jacket. I had a pair of mirrors left over from a 1998 Yahama 650 VStar, they are threaded correctly to fit the Buell Blast. They are heavy enough that there is no vibration after I get out of first gear, and I can see traffic in both mirrors now. The only problem is that they are chrome plated. I will probably paint them black this winter
Be careful if you purchase after market mirrors they are often light weight and really vibrate. Emgo makes some heavy weight mirrors for the VStar, that will fit the Blast, and you can telephone Dennis Kirk to find out the weight of the ones you like.
KennyG