1959 ajs 650 gearbox

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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67trumpy
Posts: 3
Joined: Mon Oct 26, 2020 11:41 am
Location: south australia

1959 ajs 650 gearbox

Post by 67trumpy »

what is the gearbox called and where can i get one when i kick it over its empty inside
Mick D
Posts: 2886
Joined: Mon Mar 24, 2014 5:44 pm
Location: Aberdeenshire

Re: 1959 ajs 650 gearbox

Post by Mick D »

Hi

The bike would have been supplied with an AMC gearbox installed, this type of box has a filler cap. (top rear), held on by two screws.

Do you know that the box is empty or are you assuming this because you cannot select any gears?

Regards Mick
Groily
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Posts: 2151
Joined: Thu Jul 04, 2002 1:00 am
Location: NORMANDIE FRANCE

Re: 1959 ajs 650 gearbox

Post by Groily »

If it were 'empty', there wouldn't be a clutch or primary drive on the missing end of the missing guts and it wouldn't be possible to kick it over.
I think more info is needed if any meaningful reply can be offered!
The good news is that there is lots of good info and data on AMC boxes available on here and elsewhere.
67trumpy
Posts: 3
Joined: Mon Oct 26, 2020 11:41 am
Location: south australia

Re: 1959 ajs 650 gearbox

Post by 67trumpy »

when i go to kick it over theres no resistance
Greybeard
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Posts: 456
Joined: Mon Jun 29, 2015 8:49 pm
Location: East Yorkshire

Re: 1959 ajs 650 gearbox

Post by Greybeard »

What a surreal thread. Is it a wind-up? :roll:

Steve

I see the OP has edited his posts now
Last edited by Greybeard on Tue Oct 27, 2020 1:00 pm, edited 1 time in total.
MalcW
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Joined: Tue Oct 24, 2017 12:05 pm
Location: DEVON UK

Re: 1959 ajs 650 gearbox

Post by MalcW »

67trumpy wrote:when i go to kick it over theres no resistance
It could be that the clutch isn't engaged - probably stating the obvious, but don't kick with the clutch lever pulled in. Perhaps the cable is stuck, or the clutch adjuster is wound far too far in. Maybe the clutch springs haven't been tightened sufficiently.

The kickstart itself may not be engaging.

Can you push the bike forward and back and select different gears, and neutral?

Malc
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