Vintage and Classic Hondas

Breather & Fuel to Carburator

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Drako750

Breather & Fuel to Carburator

Alrighty. Been getting great advice and info for my build here. So next question. Cause I can't find any diagrams anywhere. Even in my manual. Go figure. On the head cover. There is the breather. And on that is a hook up for a hose. What hooks up there, from where and how? Next, which may help in the first question, my carb this in the picture. It has four spots for lines to it not counting the four that are for overflow. The larger two of the four I'm thinking are the fuel lines. Which in my case will become linked with a T junction an go to my single petcock. So. What are the other two?

TOOLS1

Re: Breather & Fuel to Carburator

Administrator

The other two on the carbs would be vents. And the hose off the valve cover, goes to the oil tank/separator.
TOOLS

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1976 CB 750-A X 2
1977 CB 750-A X 4
1977 CB 750-K
1976 CB 750 F
1981 CB 750
1966 Kawasaki SG 250
1981 KZ 750 LTD
1973 CB 350
1979 CM 185 Twinstar
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Drako750

Re: Breather & Fuel to Carburator

Oil tank separator? From the breather cover? What do you mean. Should my oil tank have four hose hook ups an not three? Cause I know two lines are for the oil intake an exfill. Then one from the transmission.

shinyribs

Re: Breather & Fuel to Carburator

Administrator

In stock form, there should be a little canister behind the airbox. That's what Tools is talking about. Air-oil separator...or something like that. Hard to get to. That's where the valve cover breather hose was originally attached. If you don't have canister, that hose just vents to atmosphere. Running a piece of hose off of it to below the engine will prevent any chance of it allowing fumes to eventually stain things.

shinyribs

Re: Breather & Fuel to Carburator

Administrator