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Discussion Starter #1
Hey everyone!

I have a 2018 YFZ450R SE that I bought brand new in 2018. It has a full FMF with Power Bomb head pipe, FCI Intake, and a Power Commander V. It has been giving me some serious issues the last few times at the track. Basically at Mid to higher RPMs the Engine breaks up and cuts power. It doesn't stall just studders really bad. I just put a new Spark Plug in it and tried a few different fuel maps on the PCV but I don't think it's the fuel map because it was running perfect before. I also clean the Air filter after every ride. I really don't know too much about fuel mapping I just used a basic map for a GYTR Exhaust and intake. If anyone can provide any help or knowledge I will be very appreciative. Thanks everyone in advance.
 
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