Originally Posted by ElRod
I just received a UNI UP-123 crankcase filter to route away from inside the CPR also. I do not notice in the photos the PCV valve anywhere. Is it needed if not going into the CPR box? If not i will simply cap it in place.
i removed the check valve, that one is just in place to prevent/reduce oil vapors sucked out of the crankcase by the intake.
When you route a breather outside the airfilter there is no need for the check valve any more. And it gives you also a improved breathing surface of 200%.
Hose diameter is 15mm and the check valve connection diameters is only 7,5mm, and with a breather you get the full 15mm diameter