New AJS owner with a fork question

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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New AJS owner with a fork question

Postby martinbuilt AJS » Mon Jan 11, 2021 10:04 pm

Hi.
I'm in posession of a '51 model 18. It arrived in boxes, much is missing. I've bought or downloaded every relevant manual i could find.
I think i understand how the forks are put together, they are entirely different than anything i've worked on. A couple British bikes, some yamahas, and a couple Bultacos.

My question, before i go shopping, is whether there are items besides the seals that need renewed. One slider is stuck in place, if that offers a clue to what else i might need.
Thanks.

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Re: New AJS owner with a fork question

Postby Mick D » Tue Jan 12, 2021 9:07 am

Hi

Rather than me speculate, why not strip the forks before you go shopping? All parts are pretty easily sourced and should you need stanchions be aware that some low tensile steel ones are being offered, I'd recommend paying the extra for a high tensile set.

Regards Mick

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Re: New AJS owner with a fork question

Postby clive » Tue Jan 12, 2021 9:12 am

Hi welcome to the club. I would be inclined to take the forks apart first to make your judgement on what to buy. It could range from needing new stanchions because the original ones are rusted to hell, through new bushes for the sliders as well as the seals (the bushes should be a smooth sliding fit) to include possibly replacement fibre washers for the damper rod bolt at the bottom of the slider (thin walled socket needed or box spanner.) as there is nothing more annoying than a weep of oil once you have finished (been there).
clive
if it ain't broke don't fix

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Re: New AJS owner with a fork question

Postby martinbuilt AJS » Tue Jan 12, 2021 11:51 am

Thanks for the replies. I was just looking for a place to start.
Typically, it takes a couple weeks for orders to arrive from the UK. I worry about having them apart and losing something...
Entirely possible, in my garage.
Fiber washers, i might have missed, thanks.

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Re: New AJS owner with a fork question

Postby Trefor » Mon Jan 25, 2021 8:22 am

I have a very useful article on overhauling AMC front forks from the 'Motor Cycle' July 1966. I used it myself to do my own forks a few years ago. It may be on this website somewhere or I could email it as a PDF.

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Re: New AJS owner with a fork question

Postby SPRIDDLER » Mon Jan 25, 2021 11:00 am

Trefor wrote:I have a very useful article on overhauling AMC front forks from the 'Motor Cycle' July 1966. I could email it as a PDF.


This one is from the 'Motor Cycle' of July '66 and is downloadable from Christian's Archive:

http://archives.jampot.dk/technical/Sus ... y_1966.pdf
I poke badgers with spoons.....from 2 metres.

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Re: New AJS owner with a fork question

Postby Taid » Mon Jan 25, 2021 12:46 pm

A company called 'doxdirect' makes a nice job of printing PDFs, ring bound with a choice of front and back covers.. fast turnaround.


There are other companies, this is the one I've used .. (No connection except satisfied customer ..
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Re: New AJS owner with a fork question

Postby martinbuilt AJS » Sat Jan 30, 2021 2:52 pm

Thanks!
I've ordered a bunch of smalls from amc classic, and few other parts from the club store.
We'll see how long it takes for everything to arrive.

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Re: New AJS owner with a fork question

Postby RobC » Mon Feb 01, 2021 7:29 am

Hi
I'm at a similar stage. I've got a box of bits 1955 G80S and have been stripping the forks down. I'm just about to order a few bits. The main things I need to get are the leather washers at top and bottom of the main springs. The leather is starting to break up and I guess the bits wont help if they get past the oil seals (I'll get a pair of these too) and into the damping oil!
Hope this helps'
Rob

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