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1949 model 18 clutch adjustment #704988
08/14/17 4:26 pm
08/14/17 4:26 pm
Joined: Feb 2015
Posts: 157
NJ
towdoctor Offline OP
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towdoctor  Offline OP
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Any tips on adjusting the clutch on my model 18? It is difficult to kick start as it doesn't always turn the engine over and I suspect it maybe the clutch slipping....


1949 AJS Model 18
1972 Triumph T150V
1980 HD FXB
2006 HD XL
2017 HD FLTRX
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Re: 1949 model 18 clutch adjustment [Re: towdoctor] #705053
08/15/17 12:45 am
08/15/17 12:45 am
Joined: Aug 2001
Posts: 2,062
Oztralia
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Rohan Offline
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Rohan  Offline
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Oztralia
Are you using the valve lifter to ease the engine over compression, then applying that famous
"long swinging kick" to build momentum and fire her up ?
If not, and you are kicking directly against compression, the clutch would have to be good to
hold against that.

If you have the cover off the clutch primary (big decision in itself !!) then the first thing to do is to
eyeball the 4 springs when you lift the clutch. They should all lift equally and squarely.
If not, then they need to be adjusted so they do all lift equally and squarely.
Its quite a balancing act as to how tightly you screw down on each adjuster too, you can't just tighten
them fully, some travel has to be left for the clutch to lift when you pull the handlebar lever.

Have you checked too that there is slight freeplay in the clutch cable ?

If still no joy, then you may need to check the actual clutch plates for wear, and for being flat.
If the inserts are worn away, or the plates warped, then that can cause problems.
Having the correct number of plates fitted in the correct order is also necessary, there is no accounting for what some previous owners may have done ?!
Have fun, hopethishelps...

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #705092
08/15/17 10:55 am
08/15/17 10:55 am
Joined: Mar 2013
Posts: 309
Irene, South Africa
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robcurrie Offline
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The 4 clutch springs might be 3 springs depending on your year model. There were different gearboxes and clutches.
Rob C

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #705185
08/16/17 3:14 am
08/16/17 3:14 am
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Rohan Offline
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True - but we are talking a 49 Model 18 here, so as oem equipment it would have had a
Burman CP box and a 4 spring clutch. Thats how my 49 Model 18 came - very well worn, it must be said.

Note that the parts book lists a 4 plate clutch for the 350cc and a 5 plate for the 500.
Its not unknown for previous owners to have fitted whatever they could find when something
was worn out, so that may be worth checking for, if other avenues don't improve things ?

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #705191
08/16/17 4:54 am
08/16/17 4:54 am
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Irene, South Africa
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robcurrie Offline
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Sorry, completely overlooked 1949 in the heading.

Rob C

Re: 1949 model 18 clutch adjustment [Re: robcurrie] #705542
08/20/17 12:48 pm
08/20/17 12:48 pm
Joined: Feb 2015
Posts: 157
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towdoctor Offline OP
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towdoctor  Offline OP
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thanks all for the replies. I do use the valve lifter to try to find the sweet spot. I am reluctant to kick too hard for fear of it slipping through and damaging my old knee. I'll try today to apply all of this good advice


1949 AJS Model 18
1972 Triumph T150V
1980 HD FXB
2006 HD XL
2017 HD FLTRX
Re: 1949 model 18 clutch adjustment [Re: towdoctor] #705813
08/22/17 10:15 pm
08/22/17 10:15 pm
Joined: Aug 2001
Posts: 2,062
Oztralia
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Rohan Offline
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Oztralia
We probably should have mentioned it earlier, but it might also be wise to drain off the chaincase contents,
and replenish with the correct quantity of oil (I seem to recall engine oil, without checking).
If the oil level is too high, or old and gluggy, if could well cause the clutch to misbehave.

Di you have a sidecar on this bike, I distantly recall something along these lines (?).

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #729913
03/25/18 7:44 pm
03/25/18 7:44 pm
Joined: Feb 2015
Posts: 157
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towdoctor Offline OP
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hello again, I am back after a long winters nap. not really, but I am once again addressing this. Yes, I have a sidecar, a pretty cool Dusting. Thanks for all the suggestions I certainly have learned a lot here. Turns out clutch is fine.

Now I have learned a new lesson. Instead of speculating about the reason for difficult kickstarting, take a look inside. I find I need new ratcheting pinion and drive. Any ideas on where I can source replacements?


1949 AJS Model 18
1972 Triumph T150V
1980 HD FXB
2006 HD XL
2017 HD FLTRX
Re: 1949 model 18 clutch adjustment [Re: towdoctor] #729967
03/26/18 7:29 am
03/26/18 7:29 am
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Rohan Offline
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The Owners Club in the UK would have to be worth a try.
Or maybe they can point you someplace that can.
Got to be worth a try, and I think I saw that they now deal with non-members.

I'm a bit rusty on what these look like, although I remember the big toothed half arc, my first inclination was that a dab hand with a welder and some hard facing material and grinder could probably resurrect these, unless they were well mangled. Whether it would be worth it vs finding others is a different matter.

Also, CP gearboxes are not exactly rare on UK eBay, so buying one and playing swapsies could get you out of trouble - although you run the risk that they may not be pristine either. Although I don't recall this as being a common problem. Hopethishelps,abit.

Re: 1949 model 18 clutch adjustment [Re: Rohan] #729984
03/26/18 1:18 pm
03/26/18 1:18 pm
Joined: Feb 2015
Posts: 157
NJ
towdoctor Offline OP
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towdoctor  Offline OP
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I joined the owners club some time ago, thanks for jogging my memory. I found it difficult to communicate in previous attempts but will try again, thanks once more

Attached Files rp1.jpgrp2.jpgrp4.jpg

1949 AJS Model 18
1972 Triumph T150V
1980 HD FXB
2006 HD XL
2017 HD FLTRX
Re: 1949 model 18 clutch adjustment [Re: towdoctor] #730044
03/27/18 2:19 am
03/27/18 2:19 am
Joined: Mar 2013
Posts: 309
Irene, South Africa
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robcurrie Offline
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The AJS and Matchless Owners Club have an online parts department, you could also try AMC Classic Spares in London, they also have online parts lists and prices.

Rob C

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #730047
03/27/18 4:22 am
03/27/18 4:22 am
Joined: Aug 2001
Posts: 2,062
Oztralia
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Rohan Offline
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Oztralia
Ah, those bits, no-one is going to try to weld those.

For a Burman CP, 1949 but the same for many a year.
186-X-1 Ratchet Driving, kickstarter
183-X-1 Pinion, ratchet, kickstarter

A quick google, and British Only look to have something, NOS even
http://www.vintage-motorcycle.com/i...ite=4&pid=15&id=9783&limit=0

And someone in Sweden looks to have the other bit
http://www.basmotor.se/eng/drivpaket/vaxellada/kick.html
prices elsewhere.

Re: 1949 model 18 clutch adjustment [Re: Rohan] #730103
03/27/18 7:14 pm
03/27/18 7:14 pm
Joined: Mar 2013
Posts: 309
Irene, South Africa
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robcurrie Offline
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I found this on the AJS & M O Club's Jampot Spares:
186-X

http://www.amoc-parts.com/store/comersus_viewItem.asp?idProduct=21951

and 183-X at AMC Classic Spares (download their Gearbox parts list to see more).

Rob C

Re: 1949 model 18 clutch adjustment [Re: towdoctor] #730265
03/29/18 12:48 pm
03/29/18 12:48 pm
Joined: Feb 2015
Posts: 157
NJ
towdoctor Offline OP
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towdoctor  Offline OP
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I find this truly amazing. I did searches to no avail, I guess it helps if one knows where to look. I sourced one of the bits at Trojan Classics but thought I would be SOL for the other. I admit that I am much better at picking through boxes and tables at swap meets and flea markets than performing internet research. Words can't express my thanks and gratitude to you guys for such useful help and information. You can find me waiting by my mailbox whitworths in hand


1949 AJS Model 18
1972 Triumph T150V
1980 HD FXB
2006 HD XL
2017 HD FLTRX

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