My 2015 RX3 bike does
not have damping adjustment on the forks. However, I believe CSC introduced forks with damping adjustment on the 2016, and later models of the RX3.
To adjust the fork damping, merely turn both adjustment screws to either the fastest, or the slowest setting. Then turn each screw the same number of turns in the opposite direction, until you reach the desired level of damping.
__________________
Spud
"Never argue with an idiot. He will drag you down to his level, and beat you with experience."

Mark Twain
2015 Zongshen ZS250GY-3 (RX3)
2006 Zongshen ZS200GY-2 (Sierra 200)
2005 Honda XR650L
2004 Honda CRF250X
1998 Kawasaki KDX220
Mods made to my Zongshen ZS200GY-2:
http://www.chinariders.net/showthread.php?t=6894