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Oct 09

Posts: 7

kellyt says:

Honda CX500 Starting Problems

My 1980 Honda CX500A has starting problems when left for a few days, it takes a lot to get the engine started even when with using the choke, when it does eventually start it runs on just one cylinder for a while before running perferctly on both, usually it starts and runs fine hot or cold but after being left for 3 days or so the problem starts.

I believe that some CX's suffer with this problem.

Has anyone come accross the same problem?


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  • Posted 3 years ago (24 September 2011 04:53)

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Jan 08

Posts: 7533

kcmc says:

Honda CX 500A 1980

Hi Kellyt

31 year old bike the mind boggles,proper classic.

With very old bikes like yours its down to keeping up the maintenance more than ever as things like wiring have started to deteriorate and decay.Small faults like this are very often down to electrical components deteriorating,wiring starting to leak power or cause resistance,very often plug connectors start to set up high resistance and need changing.H.T.leads and suppressor caps get microscopic cracks which not only leak power but over time will absorb moisture compounding the problem.Of course this is besides all the mechanical problems that could also be a occuring, uneven or low compression leaky valves,worn carbs etc.If your using the bike as a weekend show piece and some fun thats OK but if its your day to day transport you could be in for some heavy duty work in the future.Good Luck


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Jan 09

Posts: 485

hairybob says:

bad starting

has your bike got the vacuum tap.

Do you leave bike on side stand or main stand.

After bike has been stood for a few days try and start it once, then take out plugs and see if they are oily, may need valve guide oil seals.

ops. just seen kcmc' reply,could be loads of things. This site is very slow to show posts.

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