Test ride new bike.
Yes take a new one out and see how smooth it is. I had my shock go bad over time. Thought it was my seat at first. Had the seat reworked, new seat helped for a while. Then this past summer went up into Nevada on the weekend, I had figured the shock was crapping out. After that short 1000+ mile ride and getting thrown up out of the seat about 6 inches twice I figured yep time for a new shock. My back hurt for three weeks after that. Got the new $$$ shock from Penske. If you can get the stock one warrantied go for it save the money!
Buckeye, Arizona(USA) 2011 Victory Cross Roads, Black police bag guards, black engine guards, black handle bars, Triumph Tiger mirrors, Triumph hand grips, set speedo/tach back 5" , adjustable timing wheel, Lloyzz Fuel Programmer III & air filter. Modified exhaust, made stock into 2 into 1. MRA windshield, Rotated front fender forward,relocated ignition switch, Bad Ace Fuel Tank Risers, Fat front tire.