Leaking oil out of black hose from the head

[yammerhammer911]

Why is this hose leaking oil

[grayracer513]

Really?  Some is normal.  A lot means you overfilled it, most likely.

 

https://www.thumpertalk.com/topic/1090697-oil-coming-out-of-the-breather-hose/

 

https://www.thumpertalk.com/topic/1075151-yz426f-breather-hose-air/

 

https://www.thumpertalk.com/topic/1046431-oil-came-out-of-valve-cover-breather-hose/