Yes, I agree with KCW, the stock shocks on this bike, don't rebuild, they are sealed. You can do a spring swap, but that is not recommended. I did it, and couldn't find anyone that would change the spring, and ended up doing it myself. Locating anything to withstand those pressures was hard, and they didn't withstand it very well, and was destroyed when I was finished.
Changing out the rear shock in it's complete form though, that is pretty simple.