I have a 2002 kdx200h. So it starts up when i get the fuel air mix right and it idles great. It just wont hit the power band without dying and it wont start again until i mess with the fuel air mixture some more. When i run it in the low end of the gears it is very choppy. Ive rebuilt the carb and got a new reed valve. Im stumped guys. I need some help.

 

Did you get it figured out? Are you running stock jets? Did you pull the petcock to see if it's gummed up from old/bad gasoline?