SOHC.co.uk Forums > CB350/400
No spark? My wife to the rescue!
AshimotoK0:
--- Quote from: Sprocket on February 10, 2020, 11:27:12 AM ---
--- Quote from: SteveW on February 06, 2020, 05:15:17 PM ---Chemicals in capacitors responding to heat?
Never heard that before and I’ve been an electronics engineer since 1984.
--- End quote ---
Really? This is pretty much my go-to when dealing with anything old that suddenly stopped working....
https://en.wikipedia.org/wiki/Capacitor_plague
--- End quote ---
Depends on the type of capacitor but if they are talking chemicals then I would think they mean wet type electrolytic capacitors and the chemicals are the electrolyte. Normally heat is bad news for electrolytics as it 'dries out' the electrolyte (they usually swell with excessive heat). So I can't think why heat would improve their performance paricularly. The problem with electrolytics is usually a long term period without being powered up and it is common to revive this by re-application of voltage, not by applying heat.However, replacement is the proper course of action but not possible on a potted module like the BB system control module. My BB 400/4 potted electronics module was on the bike when I bought it 35 years ago (and it was a good few years old then my the looks of it) , so if they do contain electrolytic caps then I consider that bad news and think it's time to ditch it and go back to the good old points type 'Kettering' ignition system that Mr. Honda provided.
Drew400:
Thank you again. All advice gratefully received. Cheers, D.
Navigation
[0] Message Index
[*] Previous page
Go to full version