Points to CDI Conversion – P125X

As part of my rebuild project, I decided to ditch the point and condenser in favor of CDI – using a PX stator – Part of the research focused on figuring out if the flywheel will work  with the new stator.  It turns out the flywheel does have a the ” S” built-in for pickup trigger but the position if off.

Information available on the net is sparse so I decided to document all steps in the procedure and here it goes:

I compared the P200 and P125 flywheels by identifying the position of pickup trigger ” S ” in relation to the woodruff key slot – this is not a very scientific method but it made sense to me !

I also compared the location of the ” S ” through the slot when at the TDC by installing each flywheel –

Then I measured the angle difference and deduced that in order for the new stator pickup to align with the ” S ” on P125X flywheel, the mounting slots need to be lengthened to compensate for angle needed to the setup to work.

I know it would be very simple to just buy a new P200 flywheel and not mess with the modification, there is no fun in that !

Believe I mounted the P200 flywheel and the engine fired up on first kick …..

Anyway, coming back to the modification, I started with a drill but soon realized that this will be bit harder and require some more specialized tools to properly lengthen the slots while keeping the curve –

Don’t forget to wrap coils with some electrical tape to protect from metal shavings and any damage —

 

 

Ebay to the rescue……

ordered a milling bit with rounded end  and mounted it to a drill press – now i had a crude milling machine !!!!  ( this item )

Slots were lengthened and i could now adjust the stator enough to align with flywheel ” S ” –

Here is the video of running engine !