Re: carb issue 1978 CB750K please help

Posted by subtlySimple on May 19, 2013; 11:22pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/carb-issue-1978-CB750K-please-help-tp4040678p4040957.html

I have a stock intake. With a 4 to 1 exhaust

On May 19, 2013 5:28 PM, "Lucky 1 [via Honda CB750'S]" <[hidden email]> wrote:

4 into 1 exhaust.

What kind of intake?

I would bet you have pods. It will never run right.
Not because you have pods but because you have to change the jetting and the
slide needle position.

Copper wire for cleaning the idle jets amy not work.
Tou need a stiff steel wire. I suggest using a #10 steel guitar string.
The hole in the stock jets is .013 thousandths so the .010 thousandths guitar string will do the job.
Then use compressed air and carb cleaner. Protect your eyes.


For pods and 4 into 1 exhaust use #120 main jet.
Drop the clip on the needle one groove, and use #42 idle jets.

The 78 probably has a non adjustable needle so you will have to use shims/washers OR get some 1977  or 1976 needles with the five groves.

Working on a CB750 Digger named Rover

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