XS type reed valve

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Oct 10, 2017
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i put mikes xs one on my bike via an inch long piece of radiator hose safety wired to metal stub coming out of engine then i run hose from valve to oil tank "done seen" a bit of goop in coolish weather where oil return is in neck o tank after bike has set a while but a ride clears it right up
 

Lineslinger

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Lineslinger,
I use to have a Mike's XS reed valve up in the battery compartment but I soon discovered that the oil in the tank would get milky and when drained when doing an oil change, there would be water at the bottom on the oil tank. That reed valve needs to be physically attached to the engine to keep the condensation at bay.
I went to the Comstock design at the back of the 850 engine and never had issues since. the heat from the engine helps cook off any condensate. Where you mounted it up near the oil tank makes it act like a water trap for condensation, IMHO.
I don't drain the wet sump plug either with the Comstock design, as it quickly discharges any excess oil in the sump rapidly back into the oil tank. About 30 seconds is all it takes and then all I see after that is the steady percolator pattern of oil return from the rear tube from the oil pump return line. YMMV
Cheers,
Tom

Good to know and something to consider.
I have yet to encounter any milky oil or moisture inside the oil tank with my configuration, just a tiny bit of water/oil mix accumulating in the low point of the line between engine and PCV inlet, and only after napping for the winter.
I have yet to find anything on the outlet side of, or in the PCV itself.

I did consider the breather outlet pictured as a source of introducing moisture but engine temp. oil should vaporize any moisture sneaking in.

L1080455.JPG
 

Lineslinger

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Who did you purchase that valve from? Mikes XS? I ask, because in Mikes installation instructions, there is mention of an early and a late style. Both are shown but it doesn't clarify which is early and which is late. One style has inlet and outlet at 90 degrees. The other style has both inlet and outlet pointing the same direction, similar to your valve.

I did buy it from Mikes. I dug around in my receipts but can't find the specific order. Give then a call.
 
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