UK dealer quoted me based on hours + parts ( if needed).....said 4 hrs covers the check but has never needed to fit anything but a chain tensioner.
£200 including a new cover gasket.
They even told me that for 99% of big cc suzuki's its almost a waste of time....generally if the sound right and are running smoothly they only do it if either the owner insists or if the bike is under warranty.
I did mine last yr and only two were slightly off and got replaced with spare shims the shop had. I had them done cuase I got the timing chain replaced etc.
Remember that it may be a 2/3 hr job @ $85/hr, but you'll have to pay for shims (if required), gaskets etc. in addition.