Motorcycle Discussions > British Bikes

BSA Gold Star misfiring

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Rex:
This one wasn't, it was  small plastic component.
Only DiYers would ever use a NOS capacitor; pro rebuilders wouldn't want the risk of early failure, which is bound to happen with a NOS capacitor 50+ years old.

bigjos:
Sorry should have added that I have fitted electronic ignition so no issues with magnetos etc.
Carb has been stopped down and cleaned so pretty sure there are no blocked jets.
Could it be a timing issue?

Rex:
Why don't you check the timing then? ???

antoni:

--- Quote from: Rex on May 19, 2019, 04:19:20 PM ---This one wasn't, it was  small plastic component. Only DiYers would ever use a NOS capacitor.....

--- End quote ---
And an electronics engineer would not use a small capacitor. A physically large capacitor with a polypropylene dielectric and a high voltage and current rating would be selected. The large physical size would mitigate against the high ambient working temperature and make sure the relatively small power (therefore heat) generated through its low ESR (effective series resistance) would be easily dissipated.

iansoady:
The Brightspark external magneto capacitor seems to work very well and it's tiny.......

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