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Discussion Starter #1
I hear different answers all the time in reference to having to jet or not jet with a slip on exhaust, Would love some advice. I have a 2013 trx400 looking into a few different slip on exhausts but dont want to jet the carb..any and all information would be Greatly appreciated. Sorry in advance if this has been covered already previously somewhere.
 

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You install the exhaust of your choice and ride the machine to determine if the carb needs re-jetted

Typically the only jetting change for a change to the exhaust would be the main jet for wide open top end of the RPM range operation.and optimum perfromance - without re-jetting the only performance decrease would be at full throttle and Wound Flat Out (WFO)
 
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