Check out the link below to see if this is the part your are trying to locate. If so, this can be accessed under Drive Belt replacement instructions on this forum. Best to get a manual - before you do an SWing work - as the manual has great supplementary information not always found on this forum.
http://www.hondapartshouse.com/oemparts/a/hon/5053f2eff870021c54be6c9f/driven-face
ITEM 7, ELEMENT, 11356-MCT-000