Topic: Does anybody have photos from this breadbox build. Or any new photos or tutorial

[Psycondolences]

Long time listener first time caller.

Does anybody have photos from this breadbox build. Or any new photos or tutorial to rebuilding a breadbox for a cb750.
I know it'll never be as good as a stock airbox but here I am with an old Henry Abe breadbox that I want to make work.
I currently have filter foam for it.
Any info is greatly appreciated.

Unfortunately a lot of old tutorial and links are dying out it seems.
http://www.lowridersbysummers.com/twt/13/index.html
vs
https://web.archive.org/web/20190906074310/http://www.lowridersbysummers.com/twt/13/index.html

[HondaMan]

The only 2 things I've been able to do with those long foam filters that make it reasonably ridable without just constantly fouling sparkplugs are:
1. make the foam THIN in between those 2 steel perforations. The Henry Abe foam usually disintegrated pretty young. I once bought a foam filter for a car (round) and took it apart to get that thin foam (about 3/8" thick), then ran it without any oiling. It worked OK until hiway speeds (70+), when the turbulence started messing up the airflow in the carbs.
2. extend the bowl-vent tubing on the carbs (there are 2 on the roundtop carbs, 4 on the early cable-carbs) way back to a quiet area, like in between the battery and oil tank, and make a 3-hole container (like a pill bottle) that will accept the 2 vent hoses (or 4 if K0 roundtops) and have 1 more hole for them to breathe through. This will at least keep the bowls at somewhat higher pressure to push the fuel up the emulsifiers in the carbs. This will help to mitigate the plug-fouling troubles and will reduce the 'flat spot' often found around 75-90 MPH when running without a baffled airbox.

[Psycondolences]

Thank you so much, great info.
I will do both those things. Will definitely be replacing all the original Henry Abe foam.

Still unsure if I should use any foam oil or not sounds like you had good luck without it other then highway speeds so maybe ill give it a try without first.
I've also heard of applying duct tape to the sides of the interior screen to prevent crossflow, but I'm not sure how much or how little of the side areas to tape down, also not sure how effective it is.

Just for added info, Its going on a 1973 CB750 K3 with 657a Carbs. Im not 100% sure but I believe those are the round tops.

[Psycondolences]

Realize now I originally posted this is in the wrong spot on the forum. Sorry new here.

Does anybody have photos from this breadbox build. Or any new photos or tutorial to rebuilding a breadbox for a cb750.
I know it'll never be as good as a stock airbox but here I am with an old Henry Abe breadbox that I want to make work.
I currently have filter foam for it.
Already doing some great stuff recommended by Hondaman
but any more info is greatly appreciated.

Unfortunately a lot of old tutorial and links are dying out it seems.
http://www.lowridersbysummers.com/twt/13/index.html
vs
https://web.archive.org/web/20190906074310/http://www.lowridersbysummers.com/twt/13/index.html

[newday777]

Welcome aboard the forum from southern NH

I have a couple of those HA Breadbox filters that I got in parts purchases but haven't done anything with them other than try to read up on them and like you said there isn't much of anything to find on them.
I remember having one or two of them on hand in the parts department for chopper guys back in the 70s who liked the look of them but I don't remember if I got any feedback on how they ran.

So is your bike stock? Do you have the stock airbox for it? Did you just buy this breadbox?
As Mark(HondaMan) said, your bike will run better with the stock setup than trying to make it "cool" looking. There's a thread at the top of the sohc4 bike section called "so you want to run pods" that you should read carefully through before venturing changing the intake if you are not an old school carb knowledgeable person.

BTW go to the new members section and introduce yourself and your bike, how long you have had it and what you are planning for it. We like pictures!