Novi 120x ignition is notorious for having bad condensers, heat is a condensers enemy, heat is a byproduct of electrical generation, Novi flywheels are not vented.
Disconnect the condenser from the points (blue wire with black tracer) and get a mid 1960s GM 6 cylinder condenser and splice it into the grey wire at the external coil. Use the coils lower mounting stud to mount the condenser.
The lower stud is also the best place for the bonding strap, remove the old one and run a new wire from the lower stud to one of the intake studs (not the long bolt like the original horrible idea Motobecane had).
Clean the contact points with a file and flush with brake cleaner (DO NOT use sandpaper and carb cleaner, sandpaper will leave grit and carb cleaner will leave behind lube, both can weaken the spark) then set the points gap at 0,4mm at index (where the points are widest open). The set the timing at 1,5mm BTDC.
Make sure if you still have the stock antiparasite plug cap that you DO NOT use a resistor spark plug. The resistor in the anitparasite can go bad over time, NGK LB05EP resistor cap can replace it if you do not trust it.
The 6v terminal on the two coil US wiring scheme is the common end of the spark exciter coil. Try making a jumper wire to connect the 6v terminal to common if the spark is still feeble and disconnect the harness wire that is attached to the grey wire that goes to the external spark coil (thats the kill switch wire) you can use the decompressor as a kill switch.