Hi team
Long story short I got this kit made up for the CT3 out of Malaysia.
About a 1000 measurements sent back and forth between the supplier and myself.

And I now have the first prototype. Kit can be run with or withhout a battery. And It uses your stock flywheel.
Now I got this far and completely didn't think about setting up the timing.
They have said there is + or - 15 degrees from the center of the backing plate holes. The CT3 runs 1.8 bdc.
would i set the piston at 1.8 bdc and then center the backing plate to the flywheel marking?
I need some help wrapping my head around it.

If I can nail this and get it running right. I can supply kits to you guys. Far cheaper than the vapour stuff.

 

What flywheel marking?  Did the manufacturer add one to the stock flywheel?  Is there a corresponding mark on the new stator backing plate? 

Did your CT3 have a six pole stator?  Normally the flywheel for a six pole stator is different than an four pole stator you have now...  different magnet count and spacing.

Anyway, the basic timing process with a keyed flywheel is:
1.  Install the keyed flywheel without the stator.  Rotate to exactly 1.8mm BTDC. 
2.  Use the mark on the outside rim of the flywheel to make a corresponding mark on the engine case. 
3.  If manufacturer marked flywheel, there should be a corresponding timing mark on stator plate.  Simply line stator mark up with the case mark you made in step 2.
4.  Start engine and check with timing light.  Mark on case and flywheel should align with strobe.

If you have no marks from manufacturer on flywheel and stator, you'll need to make your own.  Gets a little more complicated.

Timing markings what am I talking about...

Yes stock is a 4 pole.
And no there is no markings on either the flywheel or backing plate. They suggested I just start in the middle..
I will have to make my own as you stated.

Okay so what I would do is get the flywheel set at 1.8mm btdc without the stator installed..  Make a mark on the flywheel near one of the stator mounting bosses and a corresponding mark on the engine case. 
Now when those marks line up, piston will be at 1.8mm BTDC.

Then install stator somewhere near the middle of the slots like they said...  I'd probably start a little retarded (CCW) from center... 
Hopefully timing will be close enough to start engine....  now use timing light to check the marks you made.  With engine revved up, maximum advance should be 1.8mm BTDC.  (System could have an advance/retard curve so you need to rev through the range and set max advance at 1.8.)
It may take some trial and error moving the stator in the slots to get the max advance set at 1.8mm. 
Once you're happy with the timing, then you can remove the flywheel and put a mark on the stator that aligns with the mark on the case.  Now you can use those marks in the future to put the stator where it belongs if it's removed.

Hope that makes sense.

Thanks mark. That makes perfect sence!!
I will ask them if it has a retard/advance curve now before I go ahead and trail this in the weekend.
As always I appreciate your guidance!

Marcus

You're welcome.  Thanks for sharing your project! 

Even if the system doesn't have an "advance curve", the characteristics of the spinning magnet design will usually retard timing at cranking RPM...  just naturally...  then by 2000 RPM or so the system will be at full advance.

I'll read more thoroughly later today. But if they say fit it in the center of the slots & the flywheel is keyed then that's what i'd do, but i'd strobe it while someone turns the back wheel in gear to get an idea if its just before tdc. I think they have it all worked out to make it easy for the customer--as they should. I ran a points flywheel on my IT200 but that's a long story lol as had to strobe & set the flywheel minus the crank key but obviously wasn't a matched system. Keen to hear how it goes.