Could probably be done on the road without taking the fairing off using the large hex wrench in the tool kit except for the Gorrilla glue Honda used on the two hex bolts that hold the assembly to the steering head. Had to use a box end wrench for added leverage.
Really pretty easy to fix once I got it loose as there aren't very many parts. After I got it apart I douched everything off with Brake Clean.
In my case when the key was inserted the tumblers weren't recessed far enough to allow the unit to turn. So I used a small belt sander to gently remove the parts of the brass tumblers that protruded above the drum with the key in. Probably could have done it with a file. Then I coated everything with graphite and put it back together with a bit of blue lock-tite on the two hex bolts.
Works like a charm now.
Here are some pics of the insides.
Remove hex screws
Take out small philips screws, remove shroud,
hole cover and spring, slide out tumbler assembly,
lift out fork lock bolt and spring.
Tumbler assembly no key inserted
Tumbler assembly key in after burr removal, nice and smooth.