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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. YFZR-X Powertrain
    hello i have a 2022 yfz450r that has ais delete, full dasa 99db exhuast, fci intake, msd blaster efi and just ordered 38 motosports breather box im trying to get my yfz to stop back firing on decel and when i press the gas really fast on idle it bog anyone have similiar mods with a good map for...
    backfiring bog maps msd blaster yfz450r se
  2. YFZ450 & YFZ450R General Talk
    i have a 14 yfz450r fuel injected. ever since i installed my new exhaust and intake, it sounds like an ak-47 once i let off the throttle 🤣🤣. the back firing is crucial. not wanting to spend 800$ on a vortex. could a power commander fix the back firing?
    2014 backfiring fuel controller fuel injected yfz 450r
  3. Maintenance
    I have an 2004 Yfz and it backfires, won’t idle for more than 10 sec and is hard to start. I am looking for answers
    backfiring help poor running
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