[jayrx7trbo2]

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.

 

[Here 2 help]

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)

 

[jayrx7trbo2]

Thank you, very rare I open it up, heck rarely am I in 4th gear, always trail ridden