BSA Owners' Club Forum

General => The Star and Garter => Topic started by: ROYC on 27 February, 2017, 20:30:47

Title: Spark plugs
Post by: ROYC on 27 February, 2017, 20:30:47
Is Champion N4 the same as N4c ?

My bike is a 1958 A7SS.
Title: Re: Spark plugs
Post by: Bess on 27 February, 2017, 20:57:00
No c is conventional, c is copper plus design.
Title: Re: Spark plugs
Post by: STEVE G on 27 February, 2017, 21:08:05
They are the same, as Bess said the C means it has a copper core central electrode.
I have a N5C in my B40 in place of the N5. I doubt if you can buy a N4 or N5 these days.
This is the Champion part numbering guide. http://www.championpowersports.eu/assets/Uploads/II-Partnumbering-structure.pdf (http://www.championpowersports.eu/assets/Uploads/II-Partnumbering-structure.pdf)
Title: Re: Spark plugs
Post by: ROYC on 27 February, 2017, 22:35:52
Then the plug I have to use is a Champion N4c as a replacement for the N4 .
Title: Re: Spark plugs
Post by: STAR TWIN on 28 February, 2017, 06:23:29
There are plenty of equivalents out there. I use NGK B7ES.
Title: Re: Spark plugs
Post by: ROYC on 28 February, 2017, 06:39:31
Right, I've gone for AC 44XL.