Not sure about different dealers, but mine charges over and above normal 500 mile service cost to check and adjust valves.
Yes Slappy valves are Happy valves. When you do check them and need to adjust them, set them at the farthest end of the spec. ie: with the most clearance between shim and cam lobe.
There is not anything you will need as far as supplies to just check the valves. The valve cover gasket is rubber type and unless you do something very weird removing the cover it can be used several times. Some guys go buy a tube of silicone for extra insurance, but I have done five bikes so far and never used anything on them and have not had one leaker yet. Yes anything can happen, but the key to it all it taking your time and patience and everything works out great. My dealer didn't even know what size shim the bike needed and had no way of knowing unless I brought one in for them to measure. That kinda told me to do my own thing and I ordered my shims thru www.arrowheadmotorsports.com
. Fred is awesome at getting things in the mail ASAP...and he has a complete list of all the different sized shims you might need.
Also, I have this lil program that I downloaded called shimcalc. It is a calculator that you install all your current specs, type in what gap you are wanting and it will tell you specifically what size shims to order. No guessing, no fuss.
Just do a google for SHIMCALC Or KLR SHIMCALC. If you download it, you have to have a key to type in to get it to function for all four valves, just let me know when you d/l it and I will send my key to you. It doesn't cost anything to get the key, just a bit of aggrivation is all.
Hope this helps some.