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Honda cb 750 wont idle Videos

CB750 K8, Idle and Rev

First time running after a good carb cleaning. Next task is electrics. She won't start with the electric motor. Not sure what's my problem yet, but that's for another ...

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Vincent Stimpson commented on 16 Sep 2012
It sure does. The throttle cables are sticky so the return spring isn't enough to snap back the throttle. Still need to find one of those cable lube tools. Unbelievably smooth engine. I'm not looking forward to the electrics tho. Lol
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Vincent Stimpson commented on 17 Sep 2012
The K8 got new carburetors, with a accelerator pump. I think the K8 and the F3 were the only SOHC CB750s with accelerator pumps. It sure does seem to make a difference.
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mrmaxstorey commented on 16 Sep 2012
Very nice! Just jumps right up there, doesn't it?

81 cb750 weird idle

Please help! I have rebuilt the carbs and the throttle cables are okay but idle still wont come down unless i hit the killswitch real quick.

GS425 Wont Idle

trying to dial in my 79 GS425. runs good but wont idle. thinking air leak (carb gasket, etc)

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junkdreams1 commented on 24 Aug 2012
sounds like a plugged up idle air circuit to me. the intermediate and main jets are getting enough fuel for the engine to run good with open throttle, but close it and it dies. will it idle with the choke on? if so most likely your carbs idle jet is plugged/restricted. at low rpm it sounds like you are running on 1 cylinder,btw i also have a79gs425
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Riccardo Fabris commented on 24 Mar 2014
my bike does exactly the same thing and i found a big hole in the carburator boot so it coul very well be

CB750 idle problems.

idle goes straight to 4000 RPM after 2500 RPM and stays there.

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Joseph D commented on 29 Nov 2010
I have an 80 cb750. Wont idle. it runs if you constantly rev it. But i take it out on the street, whenever i hold on the clutch and let go of the throttle, it dies. My guess is that its a loose throttle cable(because i can see that there is some slack). The carburator? the sparkplugs(they are black) or a pinched fuel hose..
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BEN1969350 commented on 10 Feb 2009
check youre boots have you any vacume leaks the only thing that will do that is more air the motor would have to pull the throttle open if you have the return spring it should not do that also watch the throttle shaft.Does it move DO all carbs open close at the same time it one carb slide loose?
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rgbaker10 commented on 04 Dec 2008
Check the spark plug wires, my cb750 did that because one of the wires came of an ignition coil.
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ibdplummer commented on 03 Apr 2012
Mine is doing the same crap ! Did you find out what was wrong with yours ?
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rgbaker10 commented on 04 Dec 2008
sorry, it was the wire came off the coil
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Johnyquest1 commented on 02 Jul 2011
You're choke is stuck on.

cb750 won't start

looking for help.

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Ryan Arends commented on 21 Apr 2012
check for power at the switch. double check your connectors. i'm doing a cb750 81 myself. .. your first issue is to determine why the starter is not turning over. DOUBLE and Tripple check yoru grounds. and get rid of that meter. get yourself a digi from craftsman or anythign that has a readout. much better than that thing your using there. pull the cover to yrou starter under carb #1 and see what the situation is.
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showmaker commented on 14 Aug 2010
What happens when you kick start it? If the start button is hooked up correctly and you have power coming from the battery, then check every connection in between. Check the ignition switch? Do your lights go on when you turn the key? they should. If the switch looks good and the light don't work, then you need to figure out why power isn't reaching your lights. Check your fuses for continuity with your meter.
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Dominic LiVolsi commented on 11 Jan 2011
STARTER NEEDS TO BE GROUNDED ... PUT THE RIGHT CONTROL BACK ON AND I BET IT TURNS OVER...
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showmaker commented on 26 Nov 2010
so much for that

Honda CB 750 C.. She bangs...

CB 750 har vanskeligt ved at tage gassen og sprutter og knalder.. Er det falsk luft eller? Tændingen står rimelig godt, men der er olie inde hvor man stiller ...

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Kenneth B Nielsen commented on 19 Apr 2012
Muligt den ikke får luft nok, rens luftfilter til en start, lyder som en 2 takter.Og nej der skal ikke være olie der.

Ninja 250 Rough Idle (cold start, then hard to find a happy idle at normal rpms)

I am wondering if the bike sat around the dealer longer than they claimed... and if they didn't bother doing anything with the "make ready fee". Won't share the ...

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Broskee Smith (broskee007) commented on 06 Dec 2013
I have the same problem with mine. And it started smoking near my gear shifter. It would idle at 3 and go up without the choke on. Please help. And when I tried adjusting the idle it felt loose.
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Broskee Smith (broskee007) commented on 07 Dec 2013
ok thanks
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Klix commented on 06 Dec 2013
the smoke is most likely oil dripping down onto the exhaust... It happens, keep an eye on it though to make sure it doesn't get outta control... And you start leaking where you park or even run too low! :)by loose, do you mean the knob just spins real freely? If so, are you sure that adjuster is still connected? It shouldn't take a lot to to turn it, but there should be at least a little bit of resistance.

Cb750 won't turn over

This video was uploaded from an Android phone.

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jose001002 commented on 31 Jul 2015
Unfortunate that no one has been able to help, I too am having the same problem, did you ever find a solution? 
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