How to find the correct carb diameter

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9/23/2018 3:35 PM

Here's my web page about this that has a link to a free download of a spreadsheet that will tell you the carb diameter needed dependent on engine size, RPM, and intended use:
The old formula many have referred to in the past is an over-simplification that none of the manufacturers went by.
dia=.8 x square root (cc x RPM/1000)

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