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Post by retrobarmy1 on Nov 13, 2015 19:26:12 GMT
There seems to be a bit of popping and banging going on occasionally at tickover and a slight reluctance to rev freely. The last time I had something similar, it was the auto advance that was sticking. I understand that the CB250NA has no points (CDI) so I am wondering if there is an advance/retard mechanism as such? I'm obviously new to the SD so be gentle with me!!!
Mike
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ian
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Post by ian on Nov 13, 2015 19:46:35 GMT
It's controlled by the cdi, so you can't adjust it, but you can check it's working with a timing light. If it's not advancing properly when checked, could be a faulty cdi, but popping & banging I'd suspect the carbs first on an SD?
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Post by retrobarmy1 on Nov 13, 2015 21:44:00 GMT
I have cleaned the carbs but did not replace anything. I have ordered a 2 carb repair kit so will see how it performs once they are done. Thanks for the reply,
Mike
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Post by retrobarmy1 on Nov 15, 2015 19:36:10 GMT
Quick update: After some serious listening and suggestions above, I had another look at the carbs. I took out the idle mixture screws and found that one of the sealing rubbers looked a bit mangled. I replaced it with a spare one and it seems to have done the trick. It now ticks over more smoothly and the throttle response is much better.
Thanks for the suggestions,
Mike
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ian
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Post by ian on Nov 15, 2015 19:42:44 GMT
Nice one! I should've thought of that, I had the same problem on my CB500!
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