what happens if crankcase breather is loose?

[He Man]

i took apart my crankcase breather, cleaned it up and reinstalled it, noticed taht the bike was riding MUCH better. Turns out the breather was loose, but you had to use a wrench to get it to move from all the grime. The crankcase breather allows air to vent out but never in. How does this affect how the engine runs?

[stopintime]

According to you it runs much better if it's a working and air tight valve 

My engine builder/tuner, who I trust, says the whole stock set up has to stay.
He has his reasons - I don't know what they are - I just follow orders...

Obviously it has to do with crank case pressure/vacuum, but others will have to explain how (again).

[He Man]

of heard of the benefits of having one as it helps the motor not create pressure inthe crank case. I saw TPO sell a kit that allows you to relocate the filter to another spot, but on the same boat (and ive said this many times) i was just goign to buy some piping and run it straight into the airbox.

i cant install the stock box beause my shock is in the way.

[stopintime]

Yeah, I know you have no box.

Maybe an airtight sealed operating valve is the critical part.
Clean or replace

[battlecry]

If you can get to a boating store close to you, get enough hose to run from the breather to the rear of the bike and get a check valve like this:

http://www.boatersworld.com/product/MP80821143.htm

Presto.

[greenohawk69]

Had the same issue with my TPO crank case breather part...it was very loose and bike slowly died.  Tightened it back up and it runs fine.