BSA Owners' Club Forum

The BSA Workshop => Singles => Topic started by: OLIVER on 07 August, 2017, 12:18:16

Title: c15 bad spark
Post by: OLIVER on 07 August, 2017, 12:18:16
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 :'(
Title: Re: c15 bad spark
Post by: JulianS on 07 August, 2017, 12:58:47
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.
Title: Re: c15 bad spark
Post by: TIGERJ on 08 August, 2017, 18:26:00
       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.