Welcome; we are glad you joined us.
X2 on everything my fellow moderators have stated.
The QLink XF200 is one of the nicest, Chinese, dual sport motorcycles ever produced.
However, you can only get so much power out of a 200cc, air cooled, carbureted engine. I strongly suggest you limit your engine modifications to a different muffler, and the proper carburetor jets.
If you have time, please post photographs of your bike! We love photos.
__________________
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