Qestion On WR Models

10 replies to this topic
  • yamahaulerbillh1

Posted February 10, 2003 - 06:43 PM


I was wondering what the bottle is underneath the rear fender behind the left side panel. What is it used for? Thanks for the info :)

  • BEAN329

Posted February 10, 2003 - 07:10 PM


RTFM !!!!

if it looks like AF
smells like AF

well need i say more

  • tk421

Posted February 10, 2003 - 07:13 PM


It’s a reservoir tank to hold coolant.
When the radiator and the coolant gets hot, the coolant expands and it goes into the reservoir tank.
As the coolant cools, it contracts forming a vacuum in the cooling system which draws coolant from the reservoir tank into the cooling system keeping it full.

  • yamahaulerbillh1

Posted February 10, 2003 - 07:14 PM


Thanks for the info.

  • ThumperWR450F

Posted February 11, 2003 - 01:07 AM



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  • timvv51

Posted February 11, 2003 - 05:04 PM


Ive heard you can remove it to save weight. Whadayathink. Tim

  • x2smoker

Posted February 11, 2003 - 05:11 PM


You can remove it, YZF doesn't have one. If you do remove it, don't forget to pack a gallon of coolant so you can top off the radiator after every ride. If you ride tight, slow single track, you WILL lose coolant without the resevoir.

  • blue_beast_wins

Posted February 12, 2003 - 01:19 AM


If it's anything like a car, you take off the overflow tank and you have to change the radiator cap to a "non recovery cap"

  • Butta

Posted February 12, 2003 - 09:18 AM


I've had mine removed for almost 1000 miles...no problems. All you have to do is replace the radiator cap with a KX500 cap (1.6 instead of 1.1). I've never lost any coolant due to heating. I lost a little when I went to 14,000 ft in Colorado, but who wouldn't???



Posted February 12, 2003 - 11:26 AM


butta is correct. resivoir is only needed if you are working the motor at slow speeds

  • timvv51

Posted February 12, 2003 - 05:36 PM


I am an X XR650R owner and we always used a little water wetter in the coolant. Would this not be a good idea for the WR450 also. Tim


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