running hot

5 replies to this topic
  • 426man45

Posted June 17, 2009 - 07:14 AM


i have a 2000 yz426f. It runs hot after a min or so of just idleing to warm it up. I still have the stock jets and carb settings. But my silencer isnt packed and is cut 3 1/2 inches shorter. My cooling system is fine , like water pump and radiators work great. So does anyone have any suggestions on a good main and piolt jet or all around carb settings? Already tried repacking the muffler and that didnt help at all. My bike ran hot even before i cut the muffler and im running 93 octane all the time.

  • grayracer513

Posted June 17, 2009 - 08:12 AM


Let's throw some punctuation in there so we can figure out what it is exactly that you want to know. Is there a question?

  • 426man45

Posted June 18, 2009 - 05:29 PM


how is that haha

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  • kawasakimx8

Posted June 18, 2009 - 05:34 PM


id say bump the pilot up a size or 2 and adjust ur fuel screw.

  • aj_yz426

Posted June 18, 2009 - 05:55 PM


Its probably not the jetting, they all run hot when idling, header glows red then it will start to push coolant out the overflow tube within about a minute or two. If it overheats with riding, thats a different story.

  • kawasakimx8

Posted June 18, 2009 - 06:08 PM


yea, if the header is red while ridding or dumps coolant alot, then just go a lil bit richer.

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