Oil in the swing arm

[Larry]

I pulled my rear end apart and decided to check the drive shaft and pinion cup. I don't always pull the drive shaft but noticed some dirt stuck to the top of the joint where the rear end and swing arm mate. There was oil in the end of the swing arm so I'm thinking I need to replace the seal. First time I've had oil there. 

[Wildman]

If it was a small amount of oil it could be normal
There are some very small weep holes between the right angle drive and pinion that are designed to oil the pinion. Mine have always been plugged but I check and lube with waterproof grease at each tire change.
I'd replace the shaft seal.

[asfltdncr]

And you're sure you don't own a Buell?

[sandy]

As was stated, you probably need the replace the drive shaft seal but I recently had the same problem except: My Works performance shocks had blown their seals and the oil was from the leaking shocks. Drive unit was fine.

[Larry]

Upon closer inspection of the parts diagram of the final driven gear, I see an oil seal behind the bearing retainer behind the pinion cup. I'm thinking this is where my oil came form and not the pinion cup itself. The reason being is that the pinion cup was actually a bit rusty looking. If oil was getting by that seal I don't think the pinion cup would look rusty. I may have under greased that sucker last time thinking it gets oiled from the final drive anyway. Thoughts?  ???

Posted by: asfltdncr
"And you're sure you don't own a Buell?"

Positive I don't own a Buell, and be nice!  

[asfltdncr]

Upon closer inspection of the parts diagram of the final driven gear, I see an oil seal behind the bearing retainer behind the pinion cup. I'm thinking this is where my oil came form and not the pinion cup itself. The reason being is that the pinion cup was actually a bit rusty looking. If oil was getting by that seal I don't think the pinion cup would look rusty. I may have under greased that sucker last time thinking it gets oiled from the final drive anyway. Thoughts?  ???

Posted by: asfltdncr
"And you're sure you don't own a Buell?"

Positive I don't own a Buell, and be nice!  

Just a little light humor.I had a Buell and their oil tank is in the swingarm.

[Larry]

No problemo, I didn't know that about the Buell's.