Hissing after shut down?

[jdp1under]

Hey guys I did a search and I can't find anything has anybody heard hissing after turning off the running machine by the oil tank. I just got done servicing the sled I had the air box out because I installed a new battery this season after putting everything back together and firing it up I notice once I shut it off I heard like a de pressurizing coming from somewhere near the oil tank?

 

[MrSled]

Yep.. I hear it every time on my Nytro after I shut it down.

 

[theCATman]

Yep. No issue at all. Just a symptom of a dry sump oiling system.

 

[jdp1under]

ok the only thing I can think of is I never heard it before but its in my shop with no hood so may be more noticeable?

 

[MrSled]

ok the only thing I can think of is I never heard it before but its in my shop with no hood so may be more noticeable?

Oh ya, way more noticeable.

 

[smokingcrater]

You will also hear kind of a water trickling noise after shutdown which is also part of the dry sump.

 

[Sportsterdanne]

I run a catchcan with a small filter on my oiltank breather hose and its very noticable with that setup.