I stated this earlier, but I will repeat it once more, since it is significant.
The stock shock absorber doesn't hold much air. If you hold the schrader valve down for less than a second, all the air will be released. Obviously, the air volume inside the shock body is very limited. Therefore, if you wish to add air to the shock, I suggest you use a hand pump, or set the pressure regulator on your mechanical pump to 45 psi. Otherwise, you risk blowing an oil seal in the shock.
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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