classic motorcycle forum

Motorcycle Discussions => British Bikes => Topic started by: mossy on July 16, 2011, 09:37:48 AM

Title: b.s.a.c15
Post by: mossy on July 16, 2011, 09:37:48 AM

can anyone help please, i cannot get a spark on my c15 (distributor engine) am i right in thinking that when the ignition is switched on (i have fitted new ignition switch ) that the black and white wire (c.b. side of the coil )should be live  cos it was at some stage but not now . should i be checking the ignition switch ? or the wiring loom. any help would be much appreciated ta.

Title: Re: b.s.a.c15
Post by: Revband on July 17, 2011, 07:18:07 PM

Hi
The CB or contact breaker side of the coil will only be live when the points are open as when the points close they earth the connection, as you turn the engine over with the ignition on you should get volts then no volts as the points open and close.

Title: Re: b.s.a.c15
Post by: mossy on July 18, 2011, 03:23:58 PM

thanks for that i changed the ignition switch (put the old one back on ) and now have my spark back cheers for the reply.