SOHC.co.uk Forums > CB750

Breathers

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Mike on a bike:
Right, a rookie question. My engine has two breathing points, one on the cam cover and one on the crankcase. I am sure that I saw a picture once, quite a while back of the crankcase pipe attached to the oil tank. Is this correct or should both pipes just exit under the bike?

Coppertop1234:
I believe the short bottom crankcase breather hose is connected to the bottom of the oil tank
The top cam breather direct to floor or connects to a engine breather housing which has a foam filter inside,this  is located under the battery housing on the F1 /F2   

Cheers

adriangsmith:
Coppertop is correct. the crankcase breather goes to the oil tank.
The top breather goes to the breather housing which is as stated connected to the bottom of the battery box.
I also have a pipe coming off the breather housing which oils the chain. Not sure if this is standard or not.  :)

Mike on a bike:
Thanks for your replies, my problem is that I don't have a standard set up. I am running an aftermarket chopper oil tank and not sure if any oil would come out of the crank breather or how I would connect to my tank. If it is not necessary to connect to the oil tank then that would solve my problem. ;)

yozzer74:
What about those little filters you can just connect to engine

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