G5 Information

Information relating to the Matchless G5 or AJS Model 8 350cc Lightweight
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Jam23a30
Posts: 13
Joined: Tue Aug 20, 2019 12:28 pm
Location: UK

G5 Information

Post by Jam23a30 »

Morning all, new to the forum here and just trying to get a recently acquired G5 running.

Would someone kindly confirm the diameter and thread form I need to extract the advance retard mechanism? I need to reset it on the taper to get the timing in range of the points plate movement.

It looks like 5/16 BSF to me but I would like confirmation as the threads seem a bit damaged probably by previous extraction attempts

Many thanks in advance, Andy
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clanger9
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Joined: Sat Jun 20, 2015 9:38 am
Location: Chester, UK

Re: G5 Information

Post by clanger9 »

Hi Andy,

It's 26TPI Cycle. A toolbox retaining bolt should screw straight in.
More info on removing the mechanism here: https://www.ifixit.com/Guide/AJS-Matchl ... 91#s228870
1989 Moto Morini Dart 350
1993 Ducati 750SS
Jam23a30
Posts: 13
Joined: Tue Aug 20, 2019 12:28 pm
Location: UK

Re: G5 Information

Post by Jam23a30 »

Many Thanks, will give it a go!
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ajscomboman
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Joined: Mon Jan 01, 1990 12:00 am
Location: HAMPSHIRE UK

Re: G5 Information

Post by ajscomboman »

1/4 cycle thread
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Rob Harknett
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Joined: Mon Jan 01, 1990 12:00 am
Location: ESSEX UK

Re: G5 Information

Post by Rob Harknett »

If its the thread bolt pt. no. 000347 screws into, its certainly 1/4 26 TPI. That bolt is actually an old STD part used from the prewar era onwards on many parts of a bike, 1 5/8" long. Sizes are not usually stated in post 1951 parts list, they are in pre 52 lists. So if you see a part no. start with 3 zeros, like 000347 Old part no. STD 347 You are most likely to find sizes here.
http://archives.jampot.dk/book/Spares_l ... ements.pdf
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