G80S POINTS REPLACEMENT

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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Trevor68
Posts: 28
Joined: Thu May 18, 2017 8:07 pm
Location: LANCASHIRE UK

G80S POINTS REPLACEMENT

Post by Trevor68 »

IS THERE A DIAGRAM OR BREAKDOWN WITH PICTURES OF THE REMOVAL OF THE POINTS FROM THE MAGNETO? iv'e viewed several videos but they don't look the same as mine (1953 g80s)
Groily
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Location: NORMANDIE FRANCE

Re: G80S POINTS REPLACEMENT

Post by Groily »

If it's an SR1 you need to look at the Lucas instructions, which are widely available - see eg here: http://www.brightsparkmagnetos.com/libr ... %20SR4.pdf
If it's an N1 on the machine see eg http://www.brightsparkmagnetos.com/libr ... Pt%20A.pdf
Trevor68
Posts: 28
Joined: Thu May 18, 2017 8:07 pm
Location: LANCASHIRE UK

Re: G80S POINTS REPLACEMENT

Post by Trevor68 »

MUCH APPRECIATED GROILY,IT'S THE N1,JUST CHECKED THE PICTURE AND IT'S A PERFECT MATCH AND A VERY GOOD IMAGE .
MANY THANKS
TREVOR
Groily
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Posts: 2151
Joined: Thu Jul 04, 2002 1:00 am
Location: NORMANDIE FRANCE

Re: G80S POINTS REPLACEMENT

Post by Groily »

That's great. Same contact breaker as the Lucas post-war magdynamos, and the points are easily available.

Watch out for the thread on the fixed point - it's a bit fragile into the monkey metal, and often stripped or near-as. So can be the larger thread for the opening point up top, but less often. If the push-rod is chipped or broken at the base, also easily available and worth replacing, because you want a nice flat face on it to ensure clean points opening.
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