My best guess is you own a Zongshen 200GY-A. The engine is a copy of a Honda engine. I would guess the rear brake caliper, et cetera, are standard parts used on most Chinese motorcycles. You can probably find replacements on eBay, or from Hooper Imports, et cetera.
http://www.hooperimports.com/dept.aspx?dept_id=15-003
__________________
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