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[Norm]

Ok now this ignition has gone to pot, fitted it yesterday and it was working perfectly . Now for some reason overnight it flattened the battery with the ignition off?? Yesterday no ameter needle deflection as it sould be with electronic ignition, but this morning after fitting another battery the ameter needle started to move to neg as would be expected with points ignition. After kicking for a while with no joy, turn the ignition on, come up against compression, needle flicks left, open decomp kick through TDC and the needle stays in the left until you turn the ignition off, then it centers again. Boyer is wired white to coil +, blue to -, black to earth and the other 2 wires to the distributor. Can't get any simpler than that so what is wrong. Any thoughts?

[Dennis C]

Hi Norm

Which Boyer do you have? and is the bike pos or neg earth?, I think the Boyer has five wires two to the sensor coils and the other three connected depending on polarity, for pos earth the white wire goes to the ignition switch the red wire to earth and the black wire to the coil.

It sound like the box has been powered up permanently bypassing the ignition with just the power to the coil being switched.

[Norm]

Hi Dennis, I assume it is a mark3, doesn't say on the box, unit or invoice, just a part number 200002. Sorry I didn't mention it is a Bullet and is neg earth. I just can't understand why the needle deflects, it doesn't deflect when you turn the ignition on, but once you kick it over the needle swings to the left and stays there until you turn the ignition off. Spark is good for about 4 sparks and then it seems to weaken. Same result with another coil

[PeteF]

"Spark is good for about 4 sparks and then it seems to weaken"
Check the battery -the discharge could have killed it - check voltage under load.

[Dennis C]

Norm

I am having a bit of trouble with the wiring colours you have given, on my info the colours should be white black red not white blue black, but I still think you have it connected incorrectly, on the white red black colours for neg earth it should be connected, white to earth, red to the coil positive/ignition switch and black to the coil negative.



I would send an email to Boyer and ask them before any damage is done to the unit.

[Norm]

Peter, same deal with another battery


Dennis Colours are as per Hitchcocks paperwork white to pos of coil blue to neg of coil black to earth and the 2 trigger wires are self explanatory. It does run and when it runs spark/timing seems to be ok but it is this bit about the ameter deflecting and staying deflected that has me puzzled

[Alan (Lancashire)]

norm

http://www.boyerbransden.com/pdf/KIT000 ... 00160_.pdf


blue = neg term of coil (replacewire from points)

black = earth

white = posative feed , connect to coil + AS WELL AS a feed from the ign poz

[Dennis C]

Norm it looks like Alan has found the correct info on the B B site and your wiring corresponds, I would still be concerned about the battery going flat over night, if this has just started after fitting the Boyer unit I think further checks are in order using a multimeter in the battery lead to see if current is being drawn with the ignition off. then if so disconnect things one by one until it stops to locate the problem.

[Alan (Lancashire)]

if the ign is off how can power be drained?

where is the white connected to? , is it the ign switch or "tagged" on to the coil poz

please connect it to the coil poz along with the origional ign fed poz

[Norm]

Thanks Alan, white is conected to pos of coil and I have no idea how it can drain the battery overnight with the ignition off. I have a different battery in it and will see what happens to that overnight. Always a problem with a bike that is stored outside under a tarp and the owner gives up because he can't get it started. I think I will just refit the points and see how that goes, I can't see any good reason why anybody would fit electronic ignition to a Bullet, why complicate what has worked for the last 100 years