I did a swap on my 08 Phazer GT this weekend ,I went from a 121 to a 136 x 1.5 . I'm pretty happy with the results.It makes the sled handle much better and the swap was really not to bad to do . many Thanks to Graham ( MXZ Sledhead) for all his help. check out the link to Photobucket for a picture tour of the process we went through.
Phazer pictures by AlbertaPete - Photobucket
Phazer pictures by AlbertaPete - Photobucket