For example, check out the Lockhart Basin footage at the 6:55 mark in the following video. If an RX3 owner decides to ride the Utah BDR, he might want to install an even larger, rear sprocket to get more torque at lower engine rpms. In this instance, he would be willing to sacrifice a little top speed for better engine performance in more technical terrain.
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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