Spark Plug

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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freddie 136
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Joined: Thu Feb 14, 2008 3:13 pm
Location: South Yorks UK

Spark Plug

Post by freddie 136 »

Hi, I have a 1953 G80s, and its as a Champion N 4 C spark plug fitted not sure if this is correct or not but could some one tell me what spark plug they run in there same model bikes please.
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clive
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Location: LONDON UK

Re: Spark Plug

Post by clive »

N5 or N5C for me
clive
if it ain't broke don't fix
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thornebt
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Location: Somerset, UK

Re: Spark Plug

Post by thornebt »

My 1967 Champion catalogue lists:-

1950-64 All models Alloy heads except Scramblers and Racers Plug type N5

An upgrade would be the Champion N5G with gold palladium smaller diameter centre electrode. It has a lower voltage requirement so will spark more easily, last much longer and be more resistant to fouling.

I use Bosch W8CP (equivalent to N5G) in my 1957 G80S.

Cheers. Bruce.
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freddie 136
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Joined: Thu Feb 14, 2008 3:13 pm
Location: South Yorks UK

Re: Spark Plug

Post by freddie 136 »

Thank you Clive, thornebt, appreciated.
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