Bombardiar Carb help Please

[Old Grizzly]

i have a 2005 bombadiar rally 175 the boot to the choke is broke and the  thing runs very rough and the plug gets black in seconds witch tels me to much fuel so im guessing its the choke but the choke swith feels stuck and wont move. also how does the cable come out of thr carb i cant see it. theres a nut holding it there then i cant see in is it screwed in some how
thanks

[AintSkeered]

To remove throttle cable from carb;
Unscrew carb cap, push back the carb spring to get hold of cable, push forward cable out of valve piston, pull cable out. Go to schematic http://12.2.215.22/pub/default.asp?SessionId=22d8dde60e324aa2b45274a07e967f44&Lang=EN&brands=ATV to ID carb cap, spring, etc.. When you get to webpage, click on Products: ATV GO.   

[Old Grizzly]

thanks ill try it