There are two nuts under the top triple tree, both are held with a lock washer.
You might want to get an extra lock washer, but I reused the original.
No special tools needed. Honda shows a special tool in the manual but I used a flat punch to bend the locking tabs on the lock washer and to move the lock nut and adjustment nut.
The hardest part is getting the correct resistance, I think I usded a fish scale.

Good choice. Daryl has great stuff and is a good guy.
http://www.vtx-treme.com/Valkyrie.htm