NGK Plugs

Information relating to the Matchless G3 or AJS Model 16 350cc Heavyweight
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NGK Plugs

Postby Oasist1980 » Wed Jan 27, 2021 8:15 am

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

Would it be better with a Champion plug?

Thanks

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Re: NGK Plugs

Postby MalcW » Wed Jan 27, 2021 8:46 am

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

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Re: NGK Plugs

Postby clive » Wed Jan 27, 2021 9:03 am

If it is a magneto model try the champion N5C
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if it ain't broke don't fix

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Re: NGK Plugs

Postby alanengineer » Wed Jan 27, 2021 9:23 am

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

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Re: NGK Plugs

Postby alanengineer » Wed Jan 27, 2021 9:23 am

I cant find a motor factor that sells Champion plugs locally

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Re: NGK Plugs

Postby clive » Wed Jan 27, 2021 10:17 am

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.😜
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Re: NGK Plugs

Postby 56G80S » Wed Jan 27, 2021 2:42 pm

Always used the Champion N5 (now N5C).

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Re: NGK Plugs

Postby Duncan » Wed Jan 27, 2021 7:44 pm

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

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Re: NGK Plugs

Postby MalcW » Thu Jan 28, 2021 8:53 am

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.

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Re: NGK Plugs

Postby dave16mct » Thu Jan 28, 2021 10:49 am

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

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