YFZ450 leaking coolant

[Bansh88]

Help here?

Daughters '04 450 started leaking coolant last trip.   At a stop, we would notice leaking from bottom of case.  Never overheated or seemed to overheat.  Did drain the overflow.

Appeared to come right around impeller cover but buddy said it was coming from "piss hole".  

We topped off radiator and kept running but something ain't right.

What's fix here?  Gasket?  Impeller shaft?

 

[Sausage450r]

Sounds like it needs new shaft seals/shaft

 

[Fireballsocal]

Yup. That weep hole allows any coolant that gets past the seal to exit out. Not a big job but its unknown if you just need a new seal/ o rings or the shaft to go with it. If it's not too much money, I would replace everything with genuine yamaha parts so you only have to take it apart once. 

 

[Bansh88]

Ordered the kit last night. Cheap one from Amazon. 

 

[Zeropulp]

Not sure if you have done this mod yet or not…I did it to mine. It wasn’t very hard , and way cheaper than a rebuild.

http://www.jtatv.com/YAMAHA_YFZ450_OIL_UPGRADE_p/ou-100.htm

 

[Sand Shark]

Weep hole is known to leak on the early model YFZs.  Usually just the gasket and that o-ring is all that is needed. 

 

[Sausage450r]

There an oil freeze plug that fails too in the head.  Quick cheap preventative. Really sucks when it fails out in the dunes

 

[Realbadlarry]

Wow after reading all this, you'd think this was a polaris and can am thread.