crankcase breather storage box

[f6 white buffalo]

hi guys...can you just come off the breather box ..bypass the crankcase breather storage box and just t off  to the 2 drain hoses that go to nowhere...what it the job of the storage box...hope this question makes sense.....thanks

[Chrisj CMA]

I do know that certain modifications to the breathing system will allow water to be "inhaled" by the engine and some riders have been stranded during heavy rain.  I think that is the only risk you would have,  I cant see how normal operation of the engine would be affected by removing that piece, but it does make sense that it would be a block to free access to the airbox by water n the air during a ride in heavy rain.

[bentwrench]

Since motorcycle don't have PCV systems that breather is a critical part that keeps condensation out of your oil.

[Robert]

Have the hose off the crank case vent to air cleaner for years. No real disadvantage except the occasional smell of crankcase fumes. Bike runs fine, oil is clean no problem at all. Does it make a difference, not really, I did not like the cluttered look of the tank and extra hoses so I removed it. Put a cap on the bottom of the air cleaner box and found a piece of hose that that was the same diameter as the vent out of the crankcase and was a u shape, and ran that down behind the engine to the bottom of the engine. The engine oil is about 230 and that is enough for the condensation to burn off and the blow by in the crankcase is enough of a flow to push the contaminates out. Unless the oil is heated to the point that the water evaporates there is no way for the condensate to be removed from the oil or inside surfaces of the crankcase. The flow provided by the air cleaner vacuum is really small and actually the engine does breath better without the oil separator and small hose. Once the water becomes a vapor and the engine surfaces are hot there is no place for that water to go except out. I would not use a small diameter hose though. It needs the circulation of air to blow out the contaminates. I guess water could be sucked into the crankcase on certain occasions but generally the crankcase pressure is higher than air pressure.

[f6 white buffalo]

Guys   thanks for your advice...I think I will leave things be at the box ...not that big a deal but the damage could be ....thanks again