Valves? I suppose the folks at Atlanta Motor World in Roswell/Alpharetta would be the ones to try. You know how I feel about them, but they should have more experience with the Versys by now. I know they've been selling the 650 Ninja, too, so they ought to know the motor. Checking valves is not exactly rocket science, but you need to be a decent mechanic to figure out whether shims should be replaced or not. I haven't gotten my mileage up that high yet so I haven't thought about it. School (for me) ends next week so I will begin to have more time for riding soon. Keep in touch.