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Electrical

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A technical forum for all matters electrical

Hot wires and possibly a duff battery?

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I have just put my 2A Commando back together having replaced front and rear Isolastics amongst other things. On Friday I got it back together and it started first kick - but the AO red light didn't go out. This is supposed to go out at 12.4V  so a quick check with the multimeter and sure enough, battery sits at 12.24. (It's been on an Optimate charger throughout the rebuild of the bike) I put a bulb across the two alternator wires and the bulb glowed bright in response to an increase in engine speed - so the alternator is charging. Reconnected everything and got the bike going again.

Light Switch

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In the course of much head scratching whilst trying to establish the cause of the fuse blowing problem, I have focussed my attention on the light switch and cannot reconcile the wiring of the switch as fitted with the wiring diagram.

Does this look like the correct switch for a 1962 650SS?

The terminals number up to 7 - the wiring diagram shows terminals numbering up to 11.

I now have reason to believe that there has been some bodging going on.

Thinking definitely new light switch - would 34289A be correct?

Blowing Fuse

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I have recently acquired a magneto ignition 1962 650SS (151BJW) which seems to have appeared in a couple of magazine articles in the past Real Classic issue 163 November 2017 and Classic Bike Guide January 2024.

I have now had a couple of short outings and have removed the seat and tank to investigate cable routings etc.

In doing so, I found that the (12V) battery was completely dry and effectively knackered with zero Volts.

cyclon battery top up ?

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a have a 6v cyclon battery that has been around for god knows how many years and has never needed charging ! , I am going to fit to a  little old italian bike. I can access the top of the cell and wonder if after all these years a little distilled water may be beneficial to the gel ?acid  which is bound to have dried out a bit.Anyone tried this ?.

Dominator Battery

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Hi apologies if this has been covered in this forum already. I recently bought a Dominator and it has to be kept on charge which is ok but even so it's still tricky to start. Does anyone have any recommendations on replacement batteries for them?

Thank you,

 

Gordon

Indicator problem

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I have fitted direction indicators to my Navigator.  A set of "universal fitting" indicators, I fitted LED's rather than use the filament bulbs.  A 3 pin flasher.  The switch is a combined indicator, horn and high low handlebar mounted unit.

I fitted them, powered up and all was well.

The problem is that when I run the engine the flashing becomes very erratic.  Clearly some interference from somewhere. I'm using Boyer electronic ignition.

Horn issues

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I am a Commando owner since one week now and need to get it past the road test. Just discovered the horn is not working...

I am unsure which button should activate it: the indicator switch is on the right (European model) and the buttons above and below do nothing visual or audible. The headlight flasher is top left and the other switches on the left seem to do nothing.

Electronic Ignition Mix and Match

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Hi, My 69 750 Commando has Electronic Ignition fitted by a previous owner.

It's comprised of a Wassell Stator plate and Rotor but with a Boyer Bransden Mk3 Transistor box. I am still working through some engine issues so no chance to test it thoroughly. It did start and run.

Would you foresee any issues? Can I assume the switching signal to the transistor box is the same from the Wassell unit as from a matching BB Rotor and Stator?

I have a new boxed complete Wassell EI but didn't want to use it unless I needed to.

Thx

Eddie Cross

 

 


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