c15 bad spark

[OLIVER]

hi guys .i need some advise .after my recent rebuild of my 1960 c15
im having bad spark & backfiring issues. i fitted a new coil & condensor
during rebuild .but on rechecking theres practicly no spark. so i can only presume i have a faulty coil
or condensor. i cant replace the points as i cant find a set that fits only naff copies
so i cleaned the face /s up and to be fair look ok
it will start eventually but runs eratic..& backfires when you crack her up
and now its cracking me up.any advise guys
cheers ian

[JulianS]

Backfire suggests timing is out or auto advance not functioning correctly.

Poor spark - consider spark plug, HT lead, plug cap, points, battery condition and all the electrical connections and the ignition switch.

[TIGERJ]

Oliver
       Try wiring direct to the coil from the battery.
        Also may be worth checking the earth sometimes looks OK BUT RUST stops a good contact.
I have a good wet battery FOC if you are near Staffordshire.
Tim