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.