I'm assuming you did longer rides before the service with no problems? Did you get any other accessories around the same time? Did you get new gloves? Those can make a difference. Does the stand vibrate against the stop? Hard to imagine it would increase vibration, but you are changing the mass of the system, so who knows. Maybe they adjusted the chain...too tight, too loose?
I have some vibration on mine that isn't really noticeable except on rides over about an hour, and I sometimes get some tingling or numbness. I bought new Oury road grips to help with this but haven't installed them yet. Some have had good results with the Bar Snake, or filling the bars with BBs, lead shot, silicone, etc.
2014 V-Strom 1000 - Desert Khaki
2011 Burgman 400
2007 Honda Helix
2013 V-Strom 650 - sold