Stator-wet or dry?

[old_chopper]

I have developed a small oil leak behind my stator cover. I can't remember if the stator is oil bathed or not. If yes it's just a gasket leaking, if no then I have a cranshaft seal leaking. Any thoughts?

[James England]

I have developed a small oil leak behind my stator cover. I can't remember if the stator is oil bathed or not. If yes it's just a gasket leaking, if no then I have a cranshaft seal leaking. Any thoughts?

The stator is not oil bathed. It runs dry. It looks like you have a crankshaft end seal leak. If it were my bike, I'd run it until it got bad enough to warrant doing the major job of replacing the crank end seals.... plus, given the size of the task, any other seals I encountered on the way!

I wonder if anyone has a tech tip about replacing the seal from the outside? I know from stripping three engines that the seals are pretty hefty and have a lug round them that engages in the crankcases. It would be nice if there were some way of stopping the leak, maybe by prising out as much as possible of the old seal and using a non-lugged 'usual' oil seal. No doubt the combined wisdom of this forum will have something to say....

[petejw]

as james has stated, there is an oil seal that has a lip
on it that leaks that sits behind the rotor, to replace this type of seal
with a genuine seal u would need to seperate the cases,
but u can buy an after market seal with out this lip and replace the worn one,
i havent got a part number but im sure some1 soon will chime in
with the details.

[SFerinTEXAS]

And there's this.

Also, there is a taper fit oil galley plug at the bottom of the engine case. If it was leaking oil, you might want to pull that out and replace the O-ring with a new one. Do not by any means run or turn the engine with the alt cover off, as the oil pressure will blow that plug out and spew oil everywhere. The only thing holding that plug in is the tightened down alt cover.

http://www.xs11.com/forum/showpost.p...65&postcount=2
Guessing is fun, take it off and find out.

[CatatonicBug]

Replacing that seal is not hard at all. The hardest part for me was finding a bolt the right size to remove the rotor from the shaft. Once that's done, you can just pry out the old one and press in the new one. Do check the galley plug seal first though. It may be as simple as replacing that o-ring.

[old_chopper]

Replacing that seal is not hard at all. The hardest part for me was finding a bolt the right size to remove the rotor from the shaft. Once that's done, you can just pry out the old one and press in the new one. Do check the galley plug seal first though. It may be as simple as replacing that o-ring.

Did you have the cases split to do this? I was hoping the seal was put in from the outside and could be replaced easily.
Thanks for the replies!

[CatatonicBug]

Nope. No case-splitting required. The old seal gets destroyed in the removal process, but it comes out with only a small amount of persuasion. The new seal goes in with even pressure all the way around, and fits right in. Like I said, the hardest part was removing the rotor.

[old_chopper]

Cool. I'll tear into it tomorrow evening and see what I find. My HD is supposed to stain the floor, not the Yamaha!