Incidentally, the fork service information on pages 30-31 of the owner's manual is for conventional forks, which is not correct. I'm pretty sure the 37mm, USD forks of the RX3 are constructed similarly to the 37mm, USD forks of my Zongshen Sierra.
Therefore, most of the information in the following thread should also apply to the Zongshen RX3 forks.
http://www.chinariders.net/showthread.php?t=10266
__________________
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