what is the stock carb?

[flaneledholes]

Im pretty new to the sport and I have a 300ex(400 soon to come)
and I was wondering what the stock carb is, is it a keihin or mikiuni? Any help is greatly appreciated.

Its a keihin 35.5mm cv.

[Red Rooster]

The 300ex's carb. is a 32mm pumper
The 400ex's carb. is a 35.5mm pumper
Both are keihins.