Anonymous Posted on Feb 02, 2010

Bike seems as if its running on 2 cyclinders

1982 Honda night hawk 750 not `85 700
I cleaned the carbs on this bike as I am ready to ride again (last season the bike ran fine) but this was not the problem - it seems that the bike is running on two cyclinders only the bike has fresh gas, spark to all four cyclinders, clean air filter... now I`m wondering if it might be weak spark ??? it must be electrical as the bike ran fine last year.

Anonymous Feb 03, 2010

Hi there

Yep the gas is in the float bowls on each carb and I`ve checked the h/t leads - had to replace one of them but still nothing....

1 Answer

Arnie Burke

Honda Master 7,339 Answers
Posted on Feb 02, 2010

Arnie Burke

Honda Master

Joined: Jul 23, 2009

Answers

7339

Questions

Helped

1823996

Points

21459

R all the mufflers the same heat--make sure carbs r ok n gas is gitten to um--inspec plug wires n the rest of ign for wear and bad contacts--with an ohmeter n repair manual varius test can be done-sayonnara

Arnie Burke Feb 05, 2010

u still need to buy a clymer manual-they r detailed in repair n troublshootin-u must test for normal spark in each cylinder which could be related to wear n tear on components-its an old bike-again feel each muffler coming from where it is blue n see which ones r cold-take ur time but follow the manual

Add Your Answer

Upload

Upload an image from your computer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

Loading...

Include an image. It's worth a thousand words.

prev next

Related Questions:

1helpful

1answer

Hello all, I was just wondering how to fix an apparent open throttle on a 1982 Honda cb750 Nighthawk 750?

I suspect that the throttle cable is out of the end setting from removing and replacing the carbs or a return spring for the cable has broken off and not pulling the throttle back to idle position

Read full answer

Jul 12, 2016 • Honda Motorcycles

0helpful

1answer

Backfiring and trouble starting

If you change the exhaust pipes, you have to sync the carbs (if you cant sync them, you have to change the carb jets), usually it is backfiring because the carbs are not in balance.

Read full answer

May 18, 2013 • 1996 Honda VT 600 C Shadow

0helpful

1answer

Cleaned the carbs. found a hose hanging between the two carbs that seems to **** air. Bike is backfiring. Please fill me in ITS THE NT650GT Hawk

the carbs must be syncronized, this will set the carbs so they are using the same volume of air and will make the bike run its best

Read full answer

Aug 26, 2011 • Honda NT 400 Motorcycles

0helpful

1answer

I have a 1983 VF750S Sabre I just replaced the carb diaphragms and the needle and seats. The bike still will not run very well it won't idle either. It seems as though it is only running on a couple...

Sounds like you need to check the carbs again, paying close attention to the slow speed (idle) circuits. Be sure to clean all passages and jets thoroughly.

Read full answer

Jun 24, 2010 • 1982 Honda VF 750 S

0helpful

1answer

1983 Night Hawk 650 - only wants to run on three cylinders. Could this be a plug, plug wire, or carb. issue? Exhaust pipe is cold after 10 min with engine on. Ran fine a couple weeks ago when I had it out...

yes your thoughts are on target. could be the coil also. Id make sure that the carb for that cylnder will give some fuel when drain is opened. if it doesn't you need to clean that carb at least.check for spark on that plug to be shure it could run if it is getting fuel.that spark plug could be fouled and need to be replaced.

Read full answer

Apr 21, 2010 • Honda CB 700 SC Nighthawk Motorcycles

0helpful

1answer

Bike will not run on right side 3 cylinders bike runs and getting fire to all cyclinders bike has new plugs I think carb problem plese help

hi,that doesnt sound like a lot of fun,i dont think that all three carbs would have failed at the same time,bit hard to diagnose without seeing and hearing the bike but it sounds like the right hand side cam belt has failed,when were they last replaced?,i think factory says 60000km,but i do the ones on my bike at 30000,they are not expensive,just time consuming,hope this helps

Read full answer

Aug 10, 2009 • 1989 Honda GL 1500 Gold Wing

2helpful

2answers

My 1982 honda CB750 wont run worth anything

I guess you will have to synchronize the carbs.
Check the float levels too in all the carbs.
Check the valve clearance.
Check the carburator intake mounting rubbers for leaks.
Hope this helps!

Read full answer

Jun 15, 2009 • 2005 Honda CB 750

0helpful

1answer

Bike wont start

Clean the carbs!

Read full answer

Apr 13, 2009 • 1982 Suzuki GS 650 G Katana

0helpful

1answer

Wont start

FIRST thing to check is spark plug ,make sure it is sparking ,if it is and is wet change the plug .If plug is dry it could be the carb needs cleaning out if it has beesn stood for a while

Read full answer

Nov 15, 2008 • 2004 Yamaha DT 125 R

Not finding what you are looking for?

View Most Popular

1985 CB 700 SC Nighthawk

Motorcycles

Hello all, I was just wondering how to fix an apparent open throttle on a 1982 Honda cb750 Nighthawk 750?

Honda Motorcycles

375 views

Ask a Question

Usually answered in minutes!

Are you a Honda Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Have a manual for 1985 Honda CB 700 SC Nighthawk? Or just drag it here!

Related Topics:

Bike seems as if its running on 2 cyclinders