2014 YZ450 with Yoshimura RS4 Full System

1 reply to this topic
  • philamoto

Posted December 21, 2015 - 11:20 AM


Anyone have a map for this 2014 YZ450 with Yoshimura RS4 Full System? With the stock system I used an Action Motocross Mag map (all + 2, +3, or +4). For the Yoshi I set it all back to 0's because I heard thats how Yoshimura tests them. I called Yoshimura and they said they have to comply with EPA standards, so I thought it could be pumped up. I was wondering if someone out there has tried something different.

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  • brad12345

Posted December 27, 2015 - 07:22 AM


plus on the fuel or timing?

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