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gerbrony450

Waterpump weep hole leaks intermittently

7 posts in this topic

I replaced my waterpump impeller and bearing assembly and gaskets about five rides ago, after my waterpump went out on my 04 yzf450. After replacing it I have ridden it about 5 times maybe put 300 miles on it since then. I started it this weekend and the weep hole leaked intially when fired the bike up and eventually stopped leaking after it warmed up and I rode it for a while. I started it cold again today and it did the same thing, leaked, then stopped after it warmed up and rode it for a bit. Has anyone had this problem even after replacing everything? Any feedback is appreciated.

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Its important to replace the shaft when you swap the bearings and seals, the seals cut a groove in the shaft.

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I actually did replace the shaft, impeller and the bearings. Added a new gasket too, thats what is puzzling.

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The same thing is happening to my 03 YZ450F but I have never changed the waterpump or anything like that. I am very puzzled since I haven't toughed anything.

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Hey, I found a thread with '06 YZ450F with the same problem. They were saying it due to the colder weather. That makes sense to me.

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