Clutch problem

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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Titch
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Joined: Thu Aug 13, 2020 5:53 am
Location: Bay Of Plenty NEW ZEALAND

Clutch problem

Post by Titch »

Can anyone help me, my clutch is either in or out. I’ve just finished a complete rebuild on my 1963 m31.But I’m having clutch problems. I select first gear ok but when I start releasing the clutch lever nothing happens until it’s nearly completely out, this is about 1/4 inch of the last movement which makes for a very severe clutch. It’s got all new plates the cable is new and the gear box pivot is all good. The lever is new with 7/8 pivot. The clutch releases and functions fine except for this issue. Are there any tricks to overcome the problem or is it normal.
Mollbhan_LAPSED
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Joined: Sat Apr 06, 2019 11:52 pm
Location: Perthshire UK

Re: Clutch problem

Post by Mollbhan_LAPSED »

Not normal, sounds like the clutch plates are sticking on the drum, is the clutch drum grooved?
raffles
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Joined: Mon Jan 01, 1990 12:00 am
Location: NORTHAMPTONSHIRE UK

Re: Clutch problem

Post by raffles »

I had the same problem overcame it by increasing the spring tension. then making sure the cable had no
tight bends in it.you may have to give the adjustment on the springs several goes.I found that the adjuster
nuts on the springs were almost flush with the pressure plate.Good luck.
Titch
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Joined: Thu Aug 13, 2020 5:53 am
Location: Bay Of Plenty NEW ZEALAND

Re: Clutch problem

Post by Titch »

Thanks guys, the drum is in good condition with no grooves, I will pull things apart again but I suspect it’s something to do with the actuator lever in the gearbox.
Titch
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Posts: 12
Joined: Thu Aug 13, 2020 5:53 am
Location: Bay Of Plenty NEW ZEALAND

Re: Clutch problem

Post by Titch »

Hi, I’ve been doing some research on the actuating lever, there appears to be a couple with different angled ramps for the Norton Atlas and Commando in the AMC gearbox ?
mdt-son
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Joined: Wed Feb 01, 2012 1:22 pm
Location: Vestland NORWAY

Re: Clutch problem

Post by mdt-son »

Yes, the operating lever ramps for pre-Commando and Commando clutches are different. If you suspect the clutch operating lever to be of the wrong type, there are good images of both types at the Andover Norton parts database.
It's part no. 33 in this view:
https://www.nortonownersclub.org/sites/ ... C5EDA9.png

- Knut
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