20 Most Recent 1977 Honda Cb 400 F Questions & Answers

inspec fuses-good lookin ones can be bad-also view wiring for cuts n corrosion-hows batery or other parts-no wheelies

1977 Honda Cb... | Answered on Oct 26, 2014

if you have not used the bike for sometime this usually happens, this is a common problem with old bikes. just use it as often as you can and it will go back to its normal condition

1977 Honda Cb... | Answered on Feb 04, 2013

yep thats a sticking float, Just lowe the bottom of it, and tap the float ever so slightly,, you can even tap the cover with the handle of a screwdriver sometimes and that will pop it loose without removing the cover

1977 Honda Cb... | Answered on Jul 14, 2011

It sounds like a broken return spring. It should be inside the clutch cover on the right side of the engine. You will need to drain the engine oil and remove the screws from the cover to remove it. Work the shift lever up and down and try to see what had happened. Good luck with it

1977 Honda Cb... | Answered on Apr 02, 2011

hi, yes there is a proper tool to stop the lower damper spinning inside, look down the fork tube you will see the damper, you could utilise a wooden shaft from a broom or similar, woul best find a long flat bar and grind the end away until it fits and locks the damper, alternatly you may try fixing the lower leg in a vice gripping the caliper lugs, do not grip on the tube area of the leg, then pulling on the fork stancion
(chrome tube) as you operate your air gun, try tightening as well as slackening them to break the seal,
good luck, paul

1977 Honda Cb... | Answered on Jan 21, 2011

hi, this bike is uses a 12volt system,

1977 Honda Cb... | Answered on Jan 21, 2011

cylinder head is getting red hot because it's running lean. Check to see if there is an aftermarket fuel filter in the fuel line somewhere, also the float hight in the carbs are set right. Also drain the fuel tank and apply fresh fuel. Check to see if the tank is rusted, also if it has a device at the bottom of the gas tank that turns on and shuts off the fuel (petcock) it's possible it has a fuel flilter in there as well.

*Note if you take the petcock off you will more than likely have to replace agasket for it. Given the age of the bike it will be hard to find a gasket.

1977 Honda Cb... | Answered on Jan 03, 2011

Should be 120psi to 150psi in each cylinder.

1977 Honda Cb... | Answered on Sep 11, 2010

Yes, it is a bolt. Click on the link below to view what the manual and automactic adjustments look like for your 1977 Honda CB 400F


After about 10,000 miles, the tensioner and guide need to be changed. If this is done the cam chain will be good for another 10,000 miles with adjustments every 2,000 miles

1977 Honda Cb... | Answered on Sep 09, 2010

purchase a test light, it'll look like a pointed screw driver with a clear handle that houses a light inside it and has a wire attached and should have an alligator type clip on the end..now gain access to your battery and take off the negative wire, now attach the alligator clip to the negative battery wire that you just took off ,oh and make sure that the the key is in the off position ..now poke the sharpe end into the battery terminal post..if you have a short somewhere in your system the light will be on..now if it is on gain access to your fuse box and pull out one fuse at a time until the light goes out..when it goes out read the fuse cover to see what system is causing the short..eg the fan, headlight, brake light, turn signal, etc then you can then at least look at the wiring going to these system visuallly for chaffing, rubbing, our take out the bulbs themselves, sometime they can cause a short if there corroded real bad.

1977 Honda Cb... | Answered on Aug 11, 2010

you must have 12.5 volts from your battery

1977 Honda Cb... | Answered on Jun 16, 2010

Hi and welcome to the site,

Initially, check for +12 on the black wire from the ignition switch to the OFF/RUN switch and starter button.

Good luck and thank you for asking.

1977 Honda Cb... | Answered on Jun 11, 2010

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