cooling fluid draining, why

3 replies to this topic
  • per_s

Posted June 06, 2004 - 09:20 PM


I just bought a MY00 426 and have driven it just a few short turns approx 10 min.
Now to the question, it is draining pretty much cooling fluid from the front transparent drain tube. I have not checked the cooling level. Can it be due to a problem with the cooling system or is it just normal?
Thanks!! :thumbsup:

  • sirthumpalot

Posted June 07, 2004 - 12:42 AM


If you fill it to the top when it's cool, then it's normal to loose a little bit while it warms up. But once it has lost a little, it should not loose any more. It's normal for the coolant to be down about 1/2" in the radiator after it cools off. Are you loosing it constantly? If so, are you riding very slow, such as in eastern trails where it's 1st gear only? If that is the case then you may just be over heating.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • jack3835

Posted June 07, 2004 - 11:06 AM


I had the same issue with my 00 426 (first Thumper)and was really suprised how hot they ran. I let it idle for about a minute to warm up and it's puking fluid everywhere....Changed to Engine Ice, and now I have no problems with coolant.....just fill it to the top, and it'll spit out what it dosen't need....

  • Fly-nBri

Posted June 07, 2004 - 11:27 AM


Engine Ice IS "THE" coolant. I have never had any issues with it with riding either woods, tight trails, or open desert. USE IT! :thumbsup: :awww:

Related Content


2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

yz400f throttle bog by yz400fmaniac

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • * * * * *
  • Hot  28 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.