Another week, another 125 miles on the clock. While commuting is not the sexiest of things, you do get the miles in. I live in the country (think England) and luckily have a really pleasant ride to work. Winter is coming and this morning it was cold and clear with the temperature dipping to 45 °F. I had the pleasure of seeing the big red orb of sun rising above the horizon a few minutes to seven on the way to work. The bike is still playing up but I have faith that it won’t die completely and leave me stranded.
Well, the plugs and caps didn’t arrive as expected, probably down to the underfunded and incompetent Danish postal service. That left plenty of time to take a look at the charging system. It was kickstart only Thursday and Friday to prep the battery for a charge test. I hooked up the voltmeter as soon as I got home and it said 12.8 V. Twenty minutes later and after a change of clothes, it was down to 12.6 V. I turned on the ignition and watched in surprise as the voltage fell to under 12 V. That’s when I kicked it into life and revved to 5k RPM. I watched as the Volts, measured directly on the battery terminals, rose to 14.8. That’s when I hit the kill switch. Clearly not all is well in Chargeville.
So I pulled the regulator; the terminals were tight and clean there where it mattered, no corrosion at all. And it’s the first time it’s ever been opened; there was a red dot of paint on one of the screws, and it’s never been adjusted, red dot of paint on the adjusting screw. Then I tried to remove the rectifier (which could also do with a bit of love) but gave up because the nut is rusted pretty solid and I don’t want to trash it now. So on to the common ground wire, attached to the seat lock. The top bolt was tight, the bottom bolt where the ground point is, was “cough” loose; a bad earth connection. It must be at least ten years since I last touched that seat lock.
It’s well known that a bad earth connection can cause all sorts of strange symptoms but I’m not calling this sorted yet until a week long road test. Thanks to all but especially to Spanner 1 for making me look at the charging system.
This is where I put the headlight relays; it does compromise access to the regulator.