What is wrong? - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums

bneader11 · 06-13-2012, 11:34 PM

I have a 2006 yfz450. I will fill my radiator all the way up and the little tank in the back half full. And I will let my bike sit and idle for 10 min and after I shut it off and cool down my radiator is not full and the tank in the back keeps getting more antifreeze. And over flows. And if I just ride it around the farm a little for like 20 min on my trails when it cools down it only has half the radiator full and the jug on the back is empty. When I started with the radiator full and the jug half full. And I let all the air bubbles come out when I fill the radiator up. Do I have a problem here or is that normal?

SeniorTaco · 06-13-2012, 11:37 PM

How does your oil look?

bneader11 · 06-13-2012, 11:43 PM

Iv not drained it yet. I was going to try to figure this out first. I just had the top end rebuilt and all new gaskets put on back in april. I didn't think this was normal bc right after I had it rebuilt I would check the radiator and it would be full all the time. But y would it be pushing a lot of it back to the jug in the back? And causing it to over flow

SeniorTaco · 06-13-2012, 11:48 PM

Just from your post it sounds like a head gasket issue.

06-13-2012, 11:34 PM	#1 (permalink)
bneader11 Member Join Date: Nov 2011 Location: marietta, ohio Posts: 62	What is wrong? I have a 2006 yfz450. I will fill my radiator all the way up and the little tank in the back half full. And I will let my bike sit and idle for 10 min and after I shut it off and cool down my radiator is not full and the tank in the back keeps getting more antifreeze. And over flows. And if I just ride it around the farm a little for like 20 min on my trails when it cools down it only has half the radiator full and the jug on the back is empty. When I started with the radiator full and the jug half full. And I let all the air bubbles come out when I fill the radiator up. Do I have a problem here or is that normal?

06-13-2012, 11:37 PM	#2 (permalink)
SeniorTaco Senior Member Join Date: Mar 2012 Location: Charleston, South Carolina Posts: 3,259	How does your oil look? __________________ Measure twice, Build it once. FIX IT RIGHT THE FIRST TIME

06-13-2012, 11:48 PM	#4 (permalink)
SeniorTaco Senior Member Join Date: Mar 2012 Location: Charleston, South Carolina Posts: 3,259	Just from your post it sounds like a head gasket issue. __________________ Measure twice, Build it once. FIX IT RIGHT THE FIRST TIME

06-13-2012, 11:43 PM	#3 (permalink)
bneader11 Member Join Date: Nov 2011 Location: marietta, ohio Posts: 62	Iv not drained it yet. I was going to try to figure this out first. I just had the top end rebuilt and all new gaskets put on back in april. I didn't think this was normal bc right after I had it rebuilt I would check the radiator and it would be full all the time. But y would it be pushing a lot of it back to the jug in the back? And causing it to over flow

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