do i need fuel controller for yoshimura exhaust?

Discussion in '2012+ CRF250L Tech Talk' started by kavid2017, May 26, 2020.

  1. kavid2017

    kavid2017 New Member

    Messages:
    4
    I heard putting a new muffler like yoshimura would make bike run leaner because of more air flow???
    Do i need like a EJK controller?