Vespa ET4 pre leader stator upgrade

[estregan]

Hi, as the subject says, I want to upgrade my current 6 pole stator which I already converted from half wave to full wave. I currently installed an ecotrons EFI kit but can only measure 12.9VDC when revving to 3,000RPM and above. Since the EFI kit takes 2amps from the battery, the charging is not enough to sustain the entire system leaving me with 2 choices with their corresponding problems and questions below:



1. Upgrade to 11 pole, 3 phase stator. Looking at available stators from aliexpress and other sites, my current size stator is big at 96mm. Available 11 pole stator that I saw is 93mm with the same hole diameter of 35mm. If I get a matching flywheel for an 11 pole stator, do I need to adjust the placement of my trigger/pulse coil depending on where the bulge of my flywheel is? How to adjust?



2. Upgrade to 18 pole stator. I found one with almost similar measurements as my current stator so I think I can refit it and mount on my engine case. Do I need a matching flywheel or can I use my old 6 magnet flywheel? What other modifications should I do?



Thanks in advance to those who will read this and especially to those who will reply.

[jmkjr72]

Yes the ecotron
draws a lot of juice. Fortunately for me I was able to use factory Yamaha parts to upgrade. Yes you need the matching flywheel