I've wondered the same thing. My X didn't come with any weights. When I had my first replacement rear tire mounted at the dealer, they crimped a spoke weight on to balance it. Honestly, I couldn't tell a difference either way. Next, I mounted a new front and rear myself and left the weight where it was and still noticed no difference. I thought about getting one of those DIY balancers but at this point it seems like it may not be needed.
Swifty