Sorry I forgot to mentioned...I ordered the one listed for C50. These risers won't fit our M without modification on the triple tree. The studs come with the risers are bigger in diameter (about 9/16") so the metal sleeves on the triple tree has to be drilled and bored out to that size.
Check out this post by the member "mflueras", he has the same risers and did a very detail write-up about the installation:
http://www.motorcycle-journal.com/fo...i-install.html