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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 oem 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 450 2004 yfz 450 2005 yfz 450r yfz450 yfz450 help yfz450 problems yfz450 tuning yfz450r yfz450r se
  1. YFZ450 & YFZ450R General Talk
    Hello y’all. First post here. Have a 2016 yfz450r. Have a spark issue. New stator and new coil that are both oem parts. Have power to coil but no spark. Anyone else have a similar issue? Any help is appreciated thanks y’all.
    2016 yfz efi help no spark yfz
  2. YFZ450 & YFZ450R General Talk
    I have my old gernaded engine from my 09 yfz 450r and I was wondering what yall thought about it and if yall could give me some info/links/any input. I don't really wanna go any higher compression as mine is 12.5 and all stock besides fci intake full data exhaust and an msd blaster. I will be...
    efi rebuild yfz450r
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