Did the dealer tell you how much the 16,000 mile service will cost?
The owners manual for my 650 says things like: replace all the o ring seals in the brake calibers and master cylinder, replace the brake hoses, lube the steering head and swing arm (are you sitting down?) every TWO YEARS !
If you can get to any of the valve tappets without taking the bike half apart, check those (maybe the exhaust valves?) if those required adjustment you might want to check the intake valves.