ttr 90 carb ? 22mm?

I have a 2003 ttr 90 that i have recently purchased. the bike is missing the top of the carb(which isnt avaliable on slide, needle, spring and so on. i would like to get this thing back together as cheep as possible.

-the parts i need will cost about $70 not including the top for the carb

-a new stock carb from bike bandit is $293

-after market mikuni 22mm carb cost $45 on e-bay

I cant find a stock carb on ebay i have been looking for months. so i did some research and by what i have found the stock ttr carb is a 16mm. so im starting to think i should buy the 22mm carb and try to tune it and see if it will work?

I wanted to get some feed back from some other people before I go and waste money.

has anyone tried the 22mm carb with a stock ttr and knows it will work?

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