AJS & Matchless Owners Club

What make spark plug would have been used in 1925 ?? Specifically for a 800cc twin, I assume any side valve engine would have had the same make. Lodge, klg ???
Thx, dave

Others with the knowledge may be along n due course, but just out of interest this Lodge type H1 sparkling plug is shown in the 1927 AJS Workshop Manual......

For 1927 the Champion guide gives the type L10 plug for side valve AJS engines. Here:

http://archives.jampot.dk/technical/Ele ... 7-1955.pdf


A good supplier of vintage plugs in the U.K. is the Green Spark Plug Co. See here:

https://www.gsparkplug.com/ignition/spark-plugs

Thank you! I suspected lodge. I have a tough time navigating the archives, I wasn’t able to find it. Thanks again