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I recently rebuilt a 488 to replace my 340. I didnt have the original carbs from the 488 so im trying to use the carbs off of the 340. I believe they are 38mm. Im looking for some advice on what jets sizes to use. thanks
 

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What year 340 was it??? there is no way Polaris ever put 38's on a 340, most likely they are either 30's or 34's
 
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