For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. The gas cap is not venting properly or fuel tank venting system blocked.
How to... CX500 1979. I have a 1980 CX500 as well and just got it running right adjusting the carbs, valves and a few other things.
Aug 22, 2012 1980 Honda CX 500 A. For 1979-1982 Honda CX500C.
There are vacuum ports on the vacuum side of the carbs, these will accept a threaded vacuum adapter that will allow you to connect a pair suction gauges. Part TU15-8119.
Lately during the filling cycle water hammer is occurring. CX650C 1983. Added items Uploading: Honda CX500 Service Manual right click the chapter you want and save as https: Counter clockwise is idle up and clockwise idle down.1981 Honda CX500 full carburetor rebuild
Taken from a 1982 CB750 K. Good luck and have a wonderful day.
Taken from a 1978 CX500. Through 2016 website donations covered a mere 3. For original Keihin-carburator from Keyster carburetor parts. GL500I 1981-1982.
Honda with 13,300 miles. In the meantime, the vacuum ports are on the aluminium parts of the intake tubes between the carbs and engine head - this is the same for all models.