AJS & Matchless Owners Club

Im currently running on a NGK B8ES plug, or is the B7ES better?

Would it be better with a Champion plug?

Thanks

Can't comment on G3/Model 16s, but my magneto Model 31 was transformed by fitting Champion N5Cs in place of NGK B8ES.

Malc

If it is a magneto model try the champion N5C

I run mine on B7ES with no trouble and if you find a friendly motor factor, they are about £1.50 each. Just check they are proper NGKs.I have never had any problems, but loads of fakes about

I cant find a motor factor that sells Champion plugs locally

Buy mine on internet from green spark plug company although they are more expensive than Alan quoted. For a magneto bike i also shut the gap down to about 20thou.
They also supply a rather natty red plug cap which i have fitted to the G11CS and it easily adds another 10mph to top speed especially whilst you are standing admiring it.😜

Always used the Champion N5 (now N5C).

Johnny B

I use 6's and 7's twins or singles, I think 8's might be a bit cold

alanengineer wrote:I cant find a motor factor that sells Champion plugs locally

I go mine from The Green Spark Company, as recommended elsewhere in here. That way I knew I was getting the real thing. They do loads of other useful stuff.

Malc

I always use N5C and get them from the spares scheme.
Dave.