Motorcycle Questions? Ask a Mechanic.
Hi again and welcome back to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, yes please; post back additional concerns with the XL250.
Additionally click HERE. If you haven’t done so, please provide a positive rating at the top of your page for the original XL250 6-to-12 conversion.
Let' start with rewinding the coil. Please click HERE. And the video HERE may provide insight not only on rewinding the coil but converting a 6V motorcycle to 12V operations.
Yes, basically increase the number of turns to increase the voltage.
The second video is more of a confirmation that indeed, a 6V system can be converted to 12V and the changes /addition of parts not only rewinding the coil. This would serve as a reference hence "...provide insight..."; i.e. give you an idea and not necessarily the same procedure as that for the XL250.
Use the rewinding technique as shown in the first video.
Please click HERE. The video may be of interest.
The procedures were outlined with illustrations and pictures HERE.
The basic idea is to increase the output voltage of the charging coils.
Consider that your XL250 has two (2) 6V coils; 1 for headlight and another for the running/charging.
The simplest approach is to run the 2 6V coils in series hence 6V + 6V = 12V (an overly simplified explanation). There is no rewinding of the coils necessary. Please keep in mind that this is an attempt as the specific characteristics of the coil are unknown (to me). Further, this is a hopeful workaround to address the "... find someone to rewind my generator...not body wan to due..."
BUT also, the output current would be low HENCE the previous suggestion of using LED lights for lower current consumption.
If you want more specific procedures, you would have to determine the beginning and ending coil end (wires) of these 2 coils. Unfortunately, I can not from the pictures and must be done hands on.
Proposed re-wiring (attempt 1):
Since the system would now be 12V, ensure that all parts are intended for 12V operations.
I am currently mobile and away from my regular work computer hence no access to my files/diagrams.
Send me a copy of your wiring diagram and a picture of the new regulator.
Appreciate the pictures.