Vintage and Classic Hondas

Deletion of stock air box and breathers

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FlatheadFrank

Deletion of stock air box and breathers

So I am removing(ed) the stock air box....now I have the breather line coming off of my carbs pugged and the uptake/EGR hose(s) looped from one side if my crankcase to the other.....is there a better solution to this and/or will this cause issues with tuning or long term use.

Those without a plan will be subject to someone else's
1973 CB750k
1978 CB500
1979 CB750k

Lucky 1

Re: Deletion of stock air box and breathers

You cannot plug the "breather" line.

IT is a vent line and if you plug that your carbs will not be able to get gas from the float bowl.

You cannot plug ANY breather line as it will have negative consequences.

Need a photo.

On a Roadstar Adventure.

FlatheadFrank

Re: Deletion of stock air box and breathers

the bike does start and run....I am having issues with the carbs (pissin' all over my garage when the petcock is on), but I believe that is do to the needles sticking in the seats after being exposed to atmosphere for about two weeks, they are still due a rebuild, but here are bike in general

"looped" erg hoses.....these went from air box "y" and back

"breather" point of origin or terminus however you want to look at it

pictures as requested.

Those without a plan will be subject to someone else's
1973 CB750k
1978 CB500
1979 CB750k

TOOLS1

Re: Deletion of stock air box and breathers

Administrator

With your crankcase vent like that, you are going to have oil blowing out every place. You need to have a vent! Several places sell little vents that go right on those lines. Or you can use a fuel filter on the vent to keep the bad stuff out.
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
1982 Honda XL 80
South of Eden (Kansas City MO)