I purchased a JRT811.46 sprocket from eBay, so I could experiment with a 13T/46T sprocket ratio for my RX3. I have now ridden about 250 miles with this lower sprocket ratio, and I like it even better than the 13T/44T sprocket ratio I installed earlier.
Here are several photographs of the JTR811, 46T sprocket installed on my modified sprocket carrier.
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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