Started once, then shut off

5 replies to this topic
  • Mr426f

Posted July 16, 2016 - 02:24 AM


Just got done witn my rebuild and it started and ran for about 10 seconds then wouldnt crank back up anymore? New plug and coil idk what else to do

  • yz250f 78

Posted July 17, 2016 - 04:45 AM


Double check your timing. May have skipped a tooth. Make sure your cam chain tensioner is engaged, putting tension on chain before startup

  • Mr426f

Posted July 17, 2016 - 06:44 AM


Thanks man , idk what it was but i kicked it all morning yesterday and it still wouldnt start, my dad got on it and it wouldnt start either he handed it back to me it crunk up and stayed on now it cranks no problem! Now i gotta get it to idle .. Its my yz426f posted in wrong section

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  • grayracer513

Posted July 17, 2016 - 07:21 AM


If it won't idle, it won't want to start without holding the throttle partially open, and 426's don't like that very much.

  • Mr426f

Posted July 17, 2016 - 08:37 AM


It starts with just choke but once choke go in it shuts off

  • grayracer513

Posted July 18, 2016 - 06:21 AM


Pilot jet or passageways are clogged.

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