Print Page - The history and theory of carburetors

Title: The history and theory of carburetors
Post by: karl61 on February 23, 2011, 12:36:05 PM

(http://img839.imageshack.us/img839/4414/carb3.jpg)

(http://img713.imageshack.us/img713/5809/carb2.jpg)

(http://img156.imageshack.us/img156/6794/carb1s.jpg)

I'm studying carburetors. I bought the least expensive one on ebay for about 4.95. This one came off of a cb750 and it's a keihin.

so far I've read where the Diaphragm is up top, the floats on the bottom. Not sure what the line does on the bottom of the float or the other line right before it enters the cylinder.

Title: Re: The history and theory of carburetors
Post by: Arnie on February 23, 2011, 05:44:03 PM

Karl,

If by "line" you mean the brass spigots to attach hose to, the one from the bottom of the float bowl is a drain and the one on the engine side of the throttle plate (closest to us in the pic) is a manifold vacuum connection. This could be used for varying the ignition timing or more likely to open the fuel petcock when the engine is running.

Cheers,
Arnie

Title: Re: The history and theory of carburetors
Post by: Travis398 on February 23, 2011, 09:08:17 PM

CB750 :negative:

Title: Re: The history and theory of carburetors
Post by: Kopfjaeger on February 23, 2011, 10:12:18 PM

there is a book by Carl Shipman. Its on tuning dirt bikes, but has breakdowns and schematics and a lot on all carburettors. might be useful to you, as soon as i get it back i will let you know the title!!! carbs include kehien, mikuni and a lot i cant remeber!!!

Title: Re: The history and theory of carburetors
Post by: SlowOldGuy on February 23, 2011, 10:28:09 PM

Have you visited the files section? Lots of good carb information in there.

DavidR.

FJowners.com

General Category => General Discussion => Topic started by: karl61 on February 23, 2011, 12:36:05 PM