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Fuse blowage

Posted: Mon Feb 07, 2011 8:20 pm
by RichColours
Hi all

First time in here, thought it best to join a forum where people actually _own_ a Superfour!

Got a little electrical issue:
Sometimes, on pressing the start button on my NC31 the everything-electrical-other-than-the-headlights fuse blows. What is extra strange is that the starter motor continues to keep working, and happily turns over and the engine starts. So something's popping the main ancillary electrics fuse.

Extra, extra strange, is that if I have the bike engine off, take out that fuse, start the engine, while it's running put the fuse back in, and ride, everything is 100%. It's not yet blown the main electrics fuse _other than_ on engine start.

Any ideas?

Bloody brilliant bike, I absolutely love it. I've got a few mates that have bought 600s etc for the first bikes, and they cannot bad-boy around town like I can on mine because they don't have a high enough talent-to-power ratio!

Rich

Re: Fuse blowage

Posted: Mon Feb 07, 2011 8:46 pm
by amorti
Intermittent faults suck, big time.

There is probably a break in the loom causing a short. Could you say whether the fault occurs more often eg. with the bars turned left or right? I would start looking for the short in the RH switch cluster, then its wiring, then the wiring around the headstock.

Not a great help I'm afraid, you may be in for a long slog and/or a replacement loom, as sometimes these things are just impossible to dig out. Attached a picture of a broken wire on my CB-1 which blew that fuse whenever I hit a bump (and turning left) - interesting because it tripped the restrictor circuit into limp home mode, which wasn't great when exiting r'bouts.

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