Pods, what to do with crank case breather.

[Guest]

The tube coming down behind the transition is attached to a Hayden Krank vent that continues down underneath the bike. The vent is a one way valve that is ported to maintain a three to five lb. vacuum in the crank case. Apparently it seals the rings better and eliminates any interference internally from underneath the pistons. All I know for sure, is that I put it on and it smoothed out and increased low end power and my gas mileage went up 6MPG.

[razor02097]

So it's basically a PCV valve?

[Guest]

No, It is an umbrella valve. I guess they are both one way valves of sorts, but the umbrella valve would be more closely related to a reed valve. This valve allows air to be pushed out, with a very limited amount allowed to seep back in maintaining it's designed vacuum level. Basically a one way valve maintaining a negative pressure.

[razor02097]

Pretty sure a PCV valve uses a spring to close.