Alright guys after running my bike no matter start up or run down the road for a ride I have oil leaking out of the crankcase vent on oil pump. Are my rings not set yet or do I have a different problem. Motor is a fresh top end rebuild with new pistons and rings

 

did you remove the cam cover and see if the breather valve was damaged this was asked before you did the top end it would have been easy then - i might have missed that you did check it ?????

crankcase pressure can and does make the breather weep - re route the hose helps but it wont fix an issue with the breather valve block hole that is scored badly

 

I did check the breather gear and everything was good but did not check the hole that you are talking about I guess. I'm not sure what hole you are talking about.

 

the hole the gear goes into gas scored / worn oval up to a point it no longer can create vacume and the oil back out the breather

 

OK I got you now. I checked everything over under cam cover and I don't remember it looking scarred up or nothing but not positive either. Is there any other way to know if it is that or not.

 

turn the fitting if its a 45 facing up - connect a hose to it and run it up the center frame tube up and over the oil tank and back down to the chain area tie it off

see it is subsides if it does a one way check valve can be used in the end to aid in oil retention even more - i can direct in the check valve if you want to try that as well

 

Right on man thanks for the help I'll try that

 

Any update to this? My friend on his 73 sporty is having a similar issue.

 

The Shovelheads can benefit from a bit of massaging the Oil Breather Gear "window" too. S&S offers a "template with many of their kits.


Picture for reference

 

thanks for the pic ^