Re: 1981 CB750C Carbs Pods vs Airbox

Posted by Lucky 1 on Jul 30, 2013; 5:34am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1981-CB750C-Carbs-Pods-vs-Airbox-tp4043715p4044236.html

People keep getting mixed up.

The vacuum in the carbs is created when the pistons are on their downward stroke.
So there will always be vacuum. If you do not believe that, put your hand flat over
one of the carb intakes and turn the engine over.

All the air box does is to limit the amount of air coming into the engine.
If you actually LOOK carefully at the air box you will see that it has a hole in it
that is about 1/3 the volume of all of the carb intakes total area.

Then the air filter is also a restriction.

All the air box, air filter, and exhaust do, is limit air going into and out of the engine.

Starting to get the picture.