which carb size to run

Was going to install a 21mm carb on my tomos a35 with a 70cc airsal kit and tecno estroil exhaust. i was wondering if i can run a 21mm carb or if i should run a 19mm carb to increase velocity entering the reed cage. which carb would be best 19?20?21?

Re: which carb size to run

If you plan to spend time in the lower half of your rpm range the 19 would be best

Re: which carb size to run

bigger is not always better for sure

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