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#help #suspension #yfz450 2008 2008yfz450 2017 yamaha yfz 450r 450 450r a arms aftermarket airbox ais delete backfiring battery battery issue best coilovers big 3 big bore bog carb carb conversion chain clutch coolant crank cranks wont fire up dasa ecu efi efi tunning electric issue electrical problem engine exhaust fci fci yfz450r fourwerx fuel controller fuel injected fuel programmer full exhaust graphics gytr help help please high compression high idle hmf intake jetting leak maintainance mapping maps msd msd blaster need help nerf bars new owner no spark no start oil parts parts review pros & cons pros and cons quad racing atv rebuild rev speed rossier sand dunes shocks sprocket stalling starting starting problem stroker stroker kit throttle transmission trinity tune tune yfz450r tuning vortex vortex ecu wiring wont start yfz yfz 2015 yfz 450 2004 yfz 450 2005 yfz 450r yfz450 yfz450 help yfz450 problems yfz450 tuning yfz450r yfz450r se
  1. Maintenance
    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...
    engine help mapping
  2. YFZ450 & YFZ450R General Talk
    Hello, I have a 2017 450r se. I just installed a fuel Customs full intake with full Yoshimura exhaust. I understand that I need or should run a fuel programmer. I am not the most technology advanced person. Mechanical things I can rock but computer stress me out. Can someone recommend a good...
    efi tunning fuel programmer mapping
  3. New Member Intros
    Hello, I have a 2017 450r se. I just installed a fuel Customs full intake with full Yoshimura exhaust. I understand that I need or should run a fuel programmer. I am not the most technology advanced person. Mechanical things I can rock but computers stress me out. Can someone recommend a...
    efi tunning fuel programmer mapping
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