Usual stuff for a 10+ year old bike...
everything made of or containing rubber (tires, hoses, boots, seals, etc.)
brakes - rotor, pads, etc.
wheel bearings (ask when they were last replaced - if never, it's probably time)
neck bearings (check for excess play)
shifting behavior (false neutrals, popping out of gear)
overall feel when riding it
There are a number of V92C riders with 100k+ miles on their bikes; they are generally pretty robust, long-lived engines.
'99 V92C with K&N, PMRT chip, Vic stage 1 slipons, and engine by Rylan Vos!