XS650SG Wiring

[bhmclaughlin15]

This simple wire diagram above is what im using currently in my bike. The bike fires up and lights, turn signals, and ignition work.
i want to make sure this diagram is correct or if im doing something wrong.. my question is how would i go about adding the battery 12v 0.8a to my system..
i heard that when running a capacitor you need a battery to provide enough power to the ignition/points.

if any one can help me out here before i decide to switch over to a boyer bransden power box 3

the thought/worries i have is when i do connect my battery to the capacitor, positive with positive and so forth the bike lights do not turn on, but if i connect battery positive to the fuse box/(reg/rec) red wire and battery ground to frame, the Lights turn on!
im thinking my fuse box is the problem here, the light on fuse box 1(orange fuse) lights up but is not blown.. any thoughts on that?

any question/answer helps! i kind of whipped this up fast cause the site kept refreshing every 5 mins and im not sure why and lost all my progress writing this..

 

[Jim]

Common practice is to run a cap or a battery, not both.
Is there any reason you want to run both of them?

 

[bhmclaughlin15]

Common practice is to run a cap or a battery, not both.
Is there any reason you want to run both of them?

i heard that when running a capacitor you need a battery to provide enough power to the ignition/points. if running just a cap.. im not positive about that though.. I've asked Google AI Mode. it said it doesn't provide enough power and cause the ignition box to be confused cause of low voltage, but my main purpose is to just have the ability to have my head lights and tail lights on if the bike is on but not running for a few minutes.

also not related but it was telling me about if the ignition box has low voltage it can cause a high idle hanging. This is all from AI like ChatGPT.
only reason why i ask AI is so it can help me find forums but i found my self read chatgpt/google AI information a lot more often..

 

[Jim]

Tons of bikes out there running a cap only. The PMA puts out power as soon as you kick the motor. If the bike has sat for a while, the cap will be discharged. That first kick charges the cap... the second kick, the cap will send it's juice to the ignition and, hopefully, start the engine. It's worked that way for the better part of 100 yrs. I'd call that tried and proven. ChatGPT is apparently... full of shit.

On the other hand, switching to electronic iggy might or might not work on a cap. Hopefully someone in the know will chime in, but I think the Boyer is one that will work off the cap. Anyone know that for a fact?

My opinion, just run the battery and not the CAP. More stable that way.

 

[Jim]

....but my main purpose is to just have the ability to have my head lights and tail lights on if the bike is on but not running for a few minutes.

In that case, I would 100% go with just the battery.

Both the capacitor and battery are nothing more than energy storage devices... you only need one. The battery will get you to "headlights on if the bike isn't running for a few minutes."
The capacitor will only give you a second or two before it's fully dscharged.
Trying to use both just confuses the issue.

 

[Guy]

The old Boyer dose not like low voltage, will kick back really bad when kick starting. can't imagine one working without 12 volts to the module.

 

[Jan_P]

I Vaguely remember that Boyer Bransden don't like it
Before it shuts down it can start behave at random
Please check on Boyer website or contact

and AI says this

Boyer Bransden electronic ignitions require a stable 12V power supply and will shut down if voltage drops below 9V. Running a Boyer system without a battery relies on an alternator and a capacitor. However, this setup often makes kick-starting more difficult, which is why Boyer Bransden recommends using their dedicated Boyer Power Box instead of a simple, standalone capacitor. [1, 2, 3, 4]
Important details for operating your system without a standard battery include:

• Voltage Limitations: Older Boyer "black box" ignition systems are particularly sensitive to voltage drops and can lose their advance curve at 11V.
• Kick-starting: Kick-starting a capacitor-only or "battery-less" system can be tough because the alternator must spin fast enough to generate a strong, continuous 12V spark on the first swing.
• The Power Box Alternative: To avoid sudden voltage drops and make starting easier, you can use the Boyer Power Box, which serves as a regulator/rectifier with an integrated, highly stabilized capacitor.
• Troubleshooting Spark: If you are trying to find a spark with a capacitor and no battery, ensure you are sharing a common, solid earth ground to the frame for the coils, ignition box, and the capacitor

I have Kicked XS 650 Possibly World record times and had Kick backs hurting the knee Now good ..
I would not try Boyer or any other electronic ignition capacitor Only But maybe there are solutions