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99raptor

idling hot?

10 posts in this topic

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 coolant.is 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?

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

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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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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.

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