Need Help! Getting air in my CCI oil lines 1975 GT250

[Jacobsenjim]

I'm working on a 1975 GT250. I'm getting air in the two oil lines between the splitter and the left cylinder after about 15 minutes of riding. Could it be the check valves in the banjo fittings? Any help is appreciated

[jabcb]

Check the oil line splitter that connects an oil pump line to two cylinder oil lines. I’ve seen a small hole open up in the spitter between the two cylinder oil lines.

Using rubbing alchohol, flushed the oil line out & cleaned the outside surface. Let it thoroughly dry. Then used clear liquid electrical tape to seal the affected area.

[joethebike]

A crack could be anywhere on the oil lines. The one that kept me searching for a while occurred at the pump end for the right cylinder. A metal collar is fitted over the plastic oil line where it is joined to the banjo end and the crack was in the oil line under the collar.
Another one occurred where the line connects with the right crankcase banjo and that was fixed with a liberal coating of epoxy.