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Thats more of a plausible sizing for the choke. Even a full tilt A-series at 1608cc would probably perform better across its workable rev range with 36mm chokes. I used to run 36mm choke tubes and went back to 34mm. The end result was better punch out of low speed corners on the track

At the end of the day if the choke tubes are what have been modified, its not such a big deal to replace with an appropriate size of choice.