Today I adjusted the valve lash on my RX3 with 9,750 miles on the odometer. The exhaust valves had tightened a little, but were still in spec. The intake valves had clearance, but were tight enough so I couldn't get a 0.04 feeler gauge underneath them. I think it is wise to check the valve lash every 5,000 miles, as CSC recommends.
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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