Yes, I change my engine oil every time the odometer records an even thousand miles. In this manner I don't forget to change the engine oil every 2,000 miles.
Zongshen builds excellent engines. I have only performed routine maintenance on my Zongshen ZS200GY-2, and it now has almost 70,000 miles on the odometer.
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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