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.
Posted April 04, 2016 - 05:59 PM
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.
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