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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. YFZ Powertrain
    Well I have a 2005 yfz450 has a problem for the first start it will crank and crank and not fire but as soon as I hook up a car charger to battery I wait about 20 seconds and it will fire right up and run fine. They battery doesn't die and after that one start for the next 6 hours or so it will...
    battery issue starting starting problem
  2. Maintenance
    My 2015 YFZ450r wont start, It sputters and turns over and has compression and cranks just fine i can get it to start a little bit but it will never run valves redone by a shop and maintenanced after every ride but i noticed when the last time i rode it i went for a small trip and it was burning...
    starting problem yfz 2015

  3. 2019 yfz 450r SE

    I have a yfz 450 r SE it will turn on i go and try to start but just buzzes! I was doin donuts out in the sand and out of nowhere shuts off sounding like something broke internal! Even if i try to pull start it wont budge! Ive been told i could have dropped a valve nd broke the head. Or the...
    starting problem
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