Some ticking is normal for this powerplant when the valves are adjusted properly. Some of us just don't hear it as much with our sweet sounding exhaust!
Seriously though if you are mechanically inclined and patient (thats the tough part) you can adjust the valves yourself and be sure it's been done. Check this site out under "Volusia valve adjustment" in the How To section of the site.
How To's
.pdf format and an excellent guide with great pictures.