I bought the BBR 26mm carb and i have a stock bore and stock everything, i hooked it up and everything but i starts pouring gas. Can anyone help me ?

The float is stuck.  Just tap on it with the backend of a screwdriver or something.

Since it is so easy to pull the carb on these bikes, I'd take off the carb, unscrew the bowl and take a look at the needle seat.  There easily could be something stuck accross it keeping it from sealing.  If the seat is clean, verify the tab isn't bent really wierd, changing the float level to higher than the drain.  Lastly, make sure that the carb bowl drain screw is fully seated.  That's about all that can cause a fuel leak