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1978 CB750K 4

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Honda7503747743674

1978 CB750K 4

1978 Honda cb750 only runs on choke, rebuilt carbs , airbox is installed, i have fresh gas , new motor oil. It fires right up with choke on, it will rev really high then as soon as i push in on the choke it dies!

pat english

Re: 1978 CB750K 4

probly just need to adjust the carbs..read what rerun says here:

http://honda-cb750-s.456789.n3.nabble.com/CB750K5-Has-Me-Stumped-td460045.html

TOOLS1

Re: 1978 CB750K 4

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In reply to this post by Honda7503747743674

Your pilot jets are still plugged. You need to remove them, to clean them.
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South of Eden (Kansas City MO)

Honda7503747743674

Re: 1978 CB750K 4

Well i tried cleaning the pilot jets and that did not help , could it maybe be a vaccum leak?

TOOLS1

Re: 1978 CB750K 4

Administrator

Did, you remove them, to clean them?
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Honda7503747743674

Re: 1978 CB750K 4

Yepp, i set them back to 1 1/2 turns out

Honda7503747743674

Re: 1978 CB750K 4

Plus i let it run for a few minutes and the left two pipes dont sizzle when i touch them with a wet rag, but the right side does

shinyribs

Re: 1978 CB750K 4

Administrator

Two left two carburetors feed off one fuel line,the two on the right off of another. Maybe the tee has a blockage not allowing it to get a good amount of fuel in the left two bowls? Just a shot in the dark really...

pat english