SW Motech wideners from TwistedThrottle (listed for Yamaha) put the mirrors about an inch wider (each side) than the stock mirrors were.
I had to cut the bolts 3-4 mm because they are a bit too long.
Excellent rear view. The current position is where the Class Retro would be.
(http://i329.photobucket.com/albums/l394/stopintime/mirror3.jpg)
(http://i329.photobucket.com/albums/l394/stopintime/mirror.jpg)
(http://i329.photobucket.com/albums/l394/stopintime/mirror2.jpg)