Incidentally, you can also learn a lot about the engine, carburetor, and exhaust system on your bike by reading the posts in the TW200 forum. 
http://www.tw200forum.com/
How many miles are on the odometer? You can drop a lot of weight from you bike, and gain some power, by installing an FMF Universal Spark Arrestor.
http://chinariders.net/modules.php?n...ewtopic&t=8587
http://chinariders.net/modules.php?n...ewtopic&t=9629
Spud 
__________________
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
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