If you have time, please examine the oil separator, and take a few photographs of it. Also, please examine the hose leading to the air box. I suggest you cover the area where the hose entered the air box. This area is behind the air filter, so any dust particles which might enter it will be ingested by the cylinder.
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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