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You're good with a stock cam and the timed breather.Only reason I have a reed breather is I bought and installed a SS cam in my P11 cases in 1990's. (Wasn't a bolt in and go affair.) That SS cam did not support the timed breather. I made my own convoluted breather setup that threaded to a plate attached to the magneto hole on the timing side and used it for 3 decades. Found out about the smaller thinner cNw breather for the 72 cases after joining here and installed that in the same location on the timing side as the one I made. It doesn't actually work any better, but it looks a lot better. Later when I did the engine with the JSM JS2 cam that supports a timed breather, I eventually hooked up the timed breather and run both now. It does work and as was mentioned is better at very low RPM with the timed breather added.
You're good with a stock cam and the timed breather.
Only reason I have a reed breather is I bought and installed a SS cam in my P11 cases in 1990's. (Wasn't a bolt in and go affair.) That SS cam did not support the timed breather. I made my own convoluted breather setup that threaded to a plate attached to the magneto hole on the timing side and used it for 3 decades. Found out about the smaller thinner cNw breather for the 72 cases after joining here and installed that in the same location on the timing side as the one I made. It doesn't actually work any better, but it looks a lot better. Later when I did the engine with the JSM JS2 cam that supports a timed breather, I eventually hooked up the timed breather and run both now. It does work and as was mentioned is better at very low RPM with the timed breather added.
