idling hot?

9 replies to this topic
  • 99raptor

Posted December 22, 2004 - 02:13 PM


hadn't run my 450 for a week or so[miserable weather] so i fired her up and let it idle for 10 min or so. noticed a puddle of coolant and like to have died.pulled the skid off and cleaned it all up to see where my problem was. restarted it and climbed under the bike about 3 min one of the pink lines[i assume from the radiator ]started spitting this normal for a yz to run hot after so little idle time?better just run it around the block than just sit to promote some air flow thru the radiator?

  • SureBlue

Posted December 22, 2004 - 02:27 PM


Let them idle for over 3-5 minutes and they all puke coolant. :cry:

  • bluerider450

Posted December 22, 2004 - 02:50 PM


yeah fourstrokes run hot so you should try and keep air flowing through the radiator and it could also be running lean

  • 99raptor

Posted December 22, 2004 - 02:58 PM


thanx alot now i'll be able to sleep tonite

  • grayracer513

Posted December 22, 2004 - 03:04 PM


Yes, it's totally normal. I might as well also tell you now that 2-3 minutes of idling will cause your head pipe to glow a rather pronounced shade of red that you will one day notice if it's a little bit dark out. Four-strokes, especially those with their combustion chambers packed full of valves, are like sharks; they need to keep moving. :cry:

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  • Scooter426

Posted December 22, 2004 - 10:45 PM


normal , just keep her movin when you can. These bikes hate to sit still and idle.

  • condog_aus

Posted December 23, 2004 - 01:06 AM


Thats a seriously good way to cook an otherwise perfect engine. The manual states not to let it idle more than a few minutes without good airflow.

  • SureBlue

Posted December 23, 2004 - 02:16 AM


I just hope you haven't blown your head gasket and damaged the piston rings already...

  • Fastest1

Posted December 23, 2004 - 12:17 PM


Very unlikely at no load, hot yes, but no real damage!


Posted December 23, 2004 - 01:20 PM


Do not let a four-stroke idle for more than 3 minutes, coolant will spew out the overflow if you do.

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