I jammed a 14mm, Harbor Freight wrench between the spring coils when I changed my fork oil.
If you have access to the proper tools, you can also grind a regular wrench to make it thin enough.
However, I bought a Park Tool, DCW-1 Cone Wrench for my next session working on the RX3 forks.
You can order this wrench on eBay for a great price, and get it shipped from Levittown, PA. If you order today, you should have it delivered very quickly.
http://www.ebay.com/itm/PARK-TOOLS-D...18898088&rt=nc
__________________
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