1962 G12 CSR rear seat mount

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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PVC
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1962 G12 CSR rear seat mount

Post by PVC »

.Hello, I am a freshly minted new member of the club. I recently purchased a Matchless G12 CSR. Club research has shown it to be a mid 1962 build. The seat has had brackets fabricated (badly) to make the non standard part fit. A new seat is being fabricated by Leightons as we speak, but I need help with the rear bracket. I have no idea what it attaches to in securing the saddle. I am aware that the Road model uses bolts fitted through the seat sides and utilizing the frame rail mounting holes immediately forward of the shock absorber mounts, but I am all at sea with my CSR. Mine has a steel rmudguards fitted, not alloy.[media][/media] Help! Posted by Paul Cribb from Melbourne
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dave16mct
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Re: 1962 G12 CSR rear seat mount

Post by dave16mct »

You don't say which type of seat you ordered at Leightons. If you've ordered a CSR type I'm not sure if it'll fit on that standard mudguard. It'll most likely stick up in the air with a big gap underneath. If you're keeping the standard steel guards you'd be better off with a standard seat which will fit easily.
On a lovely CSR why not get alloy guards and CSR stays and it'll look great. Have a word with Steve Surbey at AMC Classic Spares. He supplies all you'll need to do the job properly and there'll be a queue of members who'll buy those standard guards! http://www.amcclassicspares.com/email.php
Dave.
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Re: 1962 G12 CSR rear seat mount

Post by PVC »

Thanks Dave. If I did the mud-guard change, do you know how and where the rear mount attaches?
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Joker_Bones
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Re: 1962 G12 CSR rear seat mount

Post by Joker_Bones »

This is a Leighton CSR seat...
IMG_20220907_122436.jpg
The downstands sit on the rear frame cross member.
The very back of the seat has captive threads and can be bolted though the mudguard.
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Joker_Bones
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Re: 1962 G12 CSR rear seat mount

Post by Joker_Bones »

There is a bridge and a rear loop for the mudguard.
IMG_20220907_122309.jpg
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Re: 1962 G12 CSR rear seat mount

Post by Joker_Bones »

20200203_112530~2.jpg
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dave16mct
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Re: 1962 G12 CSR rear seat mount

Post by dave16mct »

Nice pictures JB.
Dave
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Re: 1962 G12 CSR rear seat mount

Post by PVC »

JB and Dave, thank-you both for taking the time to reply. Dave is right, the alloy guard does look the part and would save some weight. I may go that way. JB, the pics are a great help!
cheers
Paul
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