The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: Ewen on 30.08. 2021 02:21

Title: Hi guys. I may have mixed PPlyg leads
Post by: Ewen on 30.08. 2021 02:21

Hi guys. I have a 57 Goldflash. Does the plug lead closest to the cylinders from the mag go on the right hand cylinder. She won't start an is spitting back but I haven't touched the timing.

Title: Re: Hi guys. I may have mixed PPlyg leads
Post by: TimK on 30.08. 2021 02:47

Hi Ewen
It depends how the timing has been set - swap them over and give it another go, you can't do any harm.
Cheers
Tim

Title: Re: Hi guys. I may have mixed PPlyg leads
Post by: BSA_54A10 on 30.08. 2021 07:44

I you fit an electronic ignition you will get a "wasted spark" because both plugs fire each stroke.
The  worst thing that can happen is a back fire through the exhaust
So do as TimK suggests /

Title: Re: Hi guys. I may have mixed PPlyg leads
Post by: Ewen on 30.08. 2021 21:24

Thanks guys. I did a quick check and timing is out. Its been ages since I worked on this bike. I reset the points to 11 thou (was about 15, 16 thou) and I had forgotten how much that alters the timing. Hopefully onto a solution now.

Title: Re: Hi guys. I may have mixed PPlyg leads
Post by: Ewen on 30.08. 2021 21:31

Got the wee mirror and torch out... confirmed that brass contact in slip ring was in line with with the correct lead. Just remembered that obvious thing.... I'm out of practise.