E-Series Jetting

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  • enmerdeur

Posted March 08, 2001 - 08:54 AM


I just put on a White Bros. E-Series exhaust (just the silencer not the head pipe)on my 99' YZ400. After doing this I now have a hesitation off throttle. This was not there with the stock exhaust. My guess is lean on the bottom. Has anyone else had experience jetting differences with the E-Series?

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