Changed coolant overflow bottle

[Newjack]

I changed a crack coolant over bottle on 2006 Busa. But there is black hose above the cap I don't know where it connect too. Please help. The black hose at bottom of bottle is connected.

 

[FlatlandBusa]

hose from the bottom of overflow goes to radiator

the other one runs down the front of the bottle towards the ground, it's for if the overflow bottle overflows

 

[fxf]

Does anyone know what's the best way to clean the brown sludge out of the bottom of the overflow tank??? Thanks, fxf

 

[fxf]

oil in air filter box

could anyone please tell my how oil gets into the air filter box, with a stock filter? ???