SOHC.co.uk Forums > CB500/550
CB 500 K1 running issue
Beefington1975:
Hello all,
I've used some of the excellent advice here to help me get my 500 k1 on the road. It was fine for a while, but has developed a running issue. I'm hoping for some thoughts/help on why it does what it does, please.
The bike will start, but will often cut out when pulling off. Then, after a short period of running it will fade at low speeds (making turns etc). The bike then won't start easily. And (strangely) seems more likely to start when on the side stand. When it does start again, only high revving will keep it going. I then have to nurse it back home, cutting out regularly trying to restart it.
So far, I have:
Cleaned and repaired the carbs
Fitted R9 fuel lines and fuel filters
Changed the spark plugs and caps
Adjusted the valve clearances
Synchronised the carbs
Checked the battery and charge (12.5v at idle, 13 5v at 4000 rpm). I did notice the voltage drop to 10v on start-up.
The bike has electronic ignition fitted- so no timing to adjust.
Can anyone offer some advice as to what to check next?
Many thanks
McCabe-Thiele (Ted):
Are you using the original coils ?
Are the leads still coming cleanly out the coils or has the outer lead started to separate worth a check.
Bryanj:
What make of ignition?
Beefington1975:
--- Quote from: McCabe-Thiele (Ted) on September 19, 2022, 02:36:52 PM ---Are you using the original coils ?
Are the leads still coming cleanly out the coils or has the outer lead started to separate worth a check.
--- End quote ---
Thanks for the response.
The coils look to have been replaced by the previous owner fairly recently. The leads look clean and solid as they some out of the coils.
Beefington1975:
--- Quote from: Bryanj on September 19, 2022, 02:39:27 PM ---What make of ignition?
--- End quote ---
Thanks for the response. It was from David Silver Spares - fitted by the previous owner in 2016
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