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This has been an ongoing problem for the past month now, it started with the headlights not turning on the first time I start the bike. (restart the bike and they come on)

I brought it to my mechanic, he tested everything and said I need a new junction box for the headlight issue, then told me my rectifier was bad.

So I purchased a brand new rectifier as well as a new junction box. (stator was tested, good)

So i then put a new battery in it and started my zx12r up and she runs great and the headlights work the first time i start the bike.

but the battery wont charge! ill pull into my drive way and turn it off. 20 minutes later ill flip the key and the dashboard lights up and i hear the fuel injection, but once i press the start switch it all turns off immediately.

Please help me! :puzzled:
 

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I'm not much good with electrics but it sounds to me like its shorting out at the switchgear for lights/ignition etc unless the new rectifier is faulty, have you tested at the battery with the bike running for voltages at 4000 rpm, it should show 14+ volts across the terminals afaik at those revs so if it does you'll know the stator/rectifyer isn't the problem and I think if its dropping to much lower than 12v then theres a short elsewhere draining the system.
 
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