Question about 2001 Yamaha WR 426 F
It depends you might of just had a bit much oil in it. if it back fires on acceleration its more than likely going to be [a spark brake down] or [timing is out] or not [getting the right voltage]voltage reg ,pick up coil,CDI unit,coil or Ignition lead spark cap, plug.If on de accell jetting check for after market pipe jetting is a good start there. Lastly Check valve clearence you can do this in any order you will find your answer
Posted on Aug 27, 2011
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Posted on Jan 02, 2017
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