09 yz450 boiling over


8 replies to this topic
  • lit549

Posted August 06, 2011 - 07:25 PM

#1

Well im sure this is a millionth time someone has asked but,,Why does my 450 run hot??I went riding today in 100deg weather at some sand dunes..Yes that is hard on a bike,but my buddies (11 kx450,10 yz250f) bikes both ran hotter but mine actuall boiled over?And on the way back it started spittin and sputtering pretty bad.Got it home and rode around yard and its fine??But still had boiling sound in radiator..Whats up with this??Weak water pump? Running lean??Or just a 450 that hates tight stuff?? Need help! Thanks..

  • rcdude33

Posted August 06, 2011 - 07:55 PM

#2

I actually put engine ice collant in mine and it helped out a lot!!! It dropped the temps a good bit. But still its a 450 they are gona get hot no matter what.

  • ofrdrcr

Posted August 07, 2011 - 08:59 AM

#3

I put larger radiators, boyesen water pump and had no problem in the sand and slow stuff. I hope I wouldn't after putting these parts on.

  • NSF3537

Posted August 07, 2011 - 09:14 AM

#4

Go faster.

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  • Octanee

Posted August 07, 2011 - 03:45 PM

#5

on ebay you can get, which i got, double core, aircraft grade alluminum rads for like 60 bucks a piece, i ride alot of trail so it helps a good amount i think, also it could be the water pump shaft and seals are worn down so they might be needing to be replaced, and at that, causing it to leak out antifreeze, you can also run straighter of distilled water, which will give better cooling, but i think they say that antifreeze is also there to help lube the pump and seals,?

  • lit549

Posted August 07, 2011 - 08:18 PM

#6

YA,IVE HAD A HONDA 450 THAT KINDA PUKED STUFF OUT TOO.ONLY THING THAT KINDA WORRIED ME THIS TIME WAS ON WAY BACK TO TRUCK,THE BIKE STARTED SPITTIN AND SPUTTERING.ONLY WAY I KEPT IT RUNNING WAS TO DOWN SHIFT AND PIN IT..THINK MY FUEL WAS BOILING??iT RAN FINE ONCE IT WAS COOLED DOWN?? THINK IM GONNA TRY THE BOYESEN SUPERCOOLER WATER PUMP SETUP??!!

  • grayracer513

Posted August 07, 2011 - 08:27 PM

#7

Caps Lock off, please.

Posted Image

  • Polar_Bus

Posted August 08, 2011 - 02:45 AM

#8

Well im sure this is a millionth time someone has asked but,,Why does my 450 run hot??I went riding today in 100deg weather at some sand dunes..Yes that is hard on a bike,but my buddies (11 kx450,10 yz250f) bikes both ran hotter but mine actuall boiled over?And on the way back it started spittin and sputtering pretty bad.Got it home and rode around yard and its fine??But still had boiling sound in radiator..Whats up with this??Weak water pump? Running lean??Or just a 450 that hates tight stuff?? Need help! Thanks..


100F is hot.

soft sand heavily loads the engine.

you don't carry high speeds in the sand dunes.

soft sand heavily loads the engine

small, lightweight MX based radiators

all of these circumstances are why you are overheating. Oversized rads are your only solution if you want to continue riding in these circumstances.

  • lit549

Posted August 08, 2011 - 03:01 AM

#9

Sorry Gray!!Most times I respond on my phone,that one was my PC..Thanks for the input guys,I was just freaking out cause of the cutting out..





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