I didn't, and here is why. I bought a brand new 2005 V Star 650 in May of this year. When the 600 service came around, I took it to the dealer, and they charged me $190.00. I looked at what they did on the "to do list", and nothing major was done. All they did was check bolts, change oil/filter, and few other small things. So I basically paid 200.00 for an oil change. Anyways, I sold the V Star at 1000 miles, and bought the Bandit.
I asked my service if they do the valve inspection at 600 mi, which they stated no, because they usually don't need to be adjusted yet.
Cool, so I bought a Clymers manual, and did the 600 mi, 200.00 "oil change" myself. I checked bolts, and tightened things to spec with a torque wrench. Everything was pretty much in spec. I plan on taking the bandit to my job's shop, and let it sit over night. The shop mechanic has worked on bikes for a long time, so i'm pretty sure he and I can adjust the valves around 1200 miles or so.