1978 Peugeot 103 LVS, 2-coil magneto.
Long ago, my Peugeot ran fine. One fine day, I was taking her down a bit of a hill, when all of a sudden, I started losing power. She died and I hauled her to the side. She started back up, but if I gave it too much gas, it would die again. I was able to slowly get back up the hill. Some investigation told me nothing. Later that day, I was able to ride her back home as if nothing had ever been the problem. Attempts to start it after that point were totally fruitless. Several months later, I've examined virtually everything in detail, and have had others helping, and nothing has worked.
Spark only at high RPMs (serious pedaling). Anything slower, and spark disappears. No arcing across points.
What I've done:
Tried new plugs galore. I have installed a new condensor and new points from Handy Bikes. Condensor was soldered fairly carefully and should not have been destroyed in the process. I swapped out the entire stator plate and replaced it with another, which would hopefully rule out any coil issues, if there were any. Points open exactly when rotor mark hits stator mark. Wire continuity is fine for all of them, wire sheathing is not compromised. Points do not conduct when separated. One thing I have not checked as precisely as I could is whether the flywheel is seated at the exact position it should relative to the crankshaft (rotor and stator marks align slightly before TDC, but exactly how much before I can't quite measure with my current toolset)
I need help. What could potentially be the problem here? I'm completely out of ideas. I would really appreciate some suggestions from the wise ones, _especially_ if you have a lot of Peugeot knowledge.
Thanks for reading.