It's likely not stock, the rear would bottom quickly.
I have a 350 XL that was used as a stunt bike, it did about a dozen drops of 10 plus feet at speed.
The front feels pretty normal.. the back is like aboard, bouncing on the seat barely moves the rear shocks.
I get the feeling the frame has bent upward in the shock mount area. That is Ok thought since I found out they used a 465 Yamaha camera bike to do the same job, and broke the frame first try.. long live the XL..