650/X-2 carb sizeing

[agua]

I have an aftermarket mikuni carb would like to put up for sale soon, but i looked around on it and cant find a size (maybe i just dident look hard enough, not sure)
but ive held it next to the stock x2 carb and its allot larger. Can someone point me in the right direction please

 

[Byeai]

normally 3 bolt holes on top where flame arrestor is is a 38mm and 4 holes is a 44mm or 46mm depends wat it came of

 

[Vumad]

flip it upside-down and measure the throat of the carb. You measure the base not the top. When you list it for sale just post a pic of the carb with a ruler on it so people can see the measurement matches the listing.

 

[dbattersby20]

^what he said