carb issues

4 replies to this topic
  • Hypheriox

Posted April 04, 2016 - 05:50 PM


I have a 2003 WR 450 and its having a bit of an issue right now. When the choke is pulled out, it will run/idle just like it is supposed to. If i close the choke, I have to bring up the idle on it and it is a bit rough. Could this just mean I need a bigger jet for air. I also just completely tore apart the carb and cleaned it so i know thats not the problem. If possible list jet size recommendations for certain altitudes.

  • stevethe

Posted April 04, 2016 - 05:59 PM


Sounds to me like a partially plugged pilot jet. They are very hard to clean. You should replace it with a new one first.

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  • 450crazy

Posted April 05, 2016 - 04:14 AM


A good bet is to take the carb somewhere they can put it in a sonic cleaner. It will most likely clean out the small passages in the carb. I had a 01 wr426 and had the same problem. The sonic cleaning fixed her right up and still running strong. Good luck hope this helps.

  • ttreewalkerr

Posted April 05, 2016 - 04:59 AM


Small guitar string works on all the passages.

  • Krannie McKranface

Posted April 05, 2016 - 05:02 AM


Put in a new pilot jet, but before you install it, ream the passage above it with #15 fishing line and lots of spray brake cleaner


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