help with running of honda cg 125

[jimbob005]

hi all,

I hope some one can help me ... I have a honda cg 125 kb 1981 6 volt system , now iv changed the spark plug and cap the tank and carb have been off and cleaned replaced the heat gard for the carb all paper gaskets replaced .

This is what iv done now its being an ass to start ( think this is down to the card setup )

When running it will run for around 2 mins and cut out iv uploaded a video to youtube

https://www.youtube.com/watch?v=HbXLBpY-lU8&feature=youtu.be

any help thanks james

[jimbob005]

one more thing the bike has not been on the road for 3 months if this helps

[Cyclingbiker]

If it helps my Haynes manual for the CG says that the possible causes for the engine dying after running for a short while is:

#1 - Blocked air hole in the fuel filler cap. If it is blocked it could possibly cause a vacuum effect in the tank that prevents any more fuel from flowing to the carb. Probably a good way to see if this is the issue just run the bike for a while with the fuel cap removed to see if the same problem occurs. If it is that I'd just blow some air through the hole to make sure it is unblocked.

or

#2 - Dirt or water in the carb. There could be some crap in the float bowl or even in the tank itself that is getting dragged through and killing the engine. It wouldn't surprise me if like you said the bike had been stood for a few months. Clean the carb out, clear the jets and maybe consider getting some fresh fuel in there. Also check the tank for rust and other crap floating around as that will not help things if they get pulled through the system. Maybe the fuel filter in the petrol tap is getting blocked so give that a clean just to be sure.

Also one more thing, check the air filter and the idle settings as that could play a part.

I did have this problem on my BR-J a couple of months back, it would die after a few minutes idling, which was pain if I was sat waiting in traffic and I'd have to kickstart the bugger ASAP to get going again. I just twiddled with the idle settings until I was happy and chucked some Redex in the tank to see if that would help and so far I have been fine.

HTH
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Honda CB500s (1999) - Honda CG 125 BR-J (1991)

Mod 1 - Passed - 12/11/12 --- Mod 2 - Passed - 26/11/12

[jimbob005]

thanks for that

forgot to say its has fresh fuel and iv put an inline fuel filter and this is all ways full when it cuts out .


im trying to test the valve gaps but having a bit of truble getting the side off i will do this tomorrow

[TheSmiler]

[jimbob005]

[TheSmiler]

[jimbob005]

Hi all ,

thanks for the reply's.. its still playing up .. today i done an oil change

https://i154.photobucket.com/albums/s267/jimbob005/Photo0025_zps5803d740.jpg

found some shiny bits in the oil

how bad is this?

thanks james

[Vincent]

Not the best pic but it doesn't look like anything to worry about to me.
____________________
Space Is Deep

[jimbob005]

Hi all

First off thanks for the replys . Second iv sorted it , I started looking at the bike the other day after trying the things that have been added to this topic none of it work then i tested the spark and it become week.

So i was taking off the side to test the points and when the side was off it had a lot of fur on the eletrics so iv cleaned it all off and now every thing is work as it should

well thanks for all your help