Some help with the CLUTCH

[Daniel Toro (DT)]

Hi all.

I need change my clutch (or put one) and I have a few doubts.

First, my clutch doesn't have the cover.
And looking the manual, i don't know how to fix if I buy one.
I need buy the sprockets too?

The picture is attached.

Well, looking at the ebay i found this itens:

http://cgi.ebay.co.uk/6-NEW-CLUTCH-SPRINGS-BSA-A-B-PLUNGER-MODELS-A7-A10_W0QQitemZ360111564483QQihZ023QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262

http://cgi.ebay.co.uk/5-NEW-SURFLEX-CLUTCH-PLATES-BSA-A7-A10-PLUNGER-6SPRING_W0QQitemZ140302917280QQihZ004QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262

http://cgi.ebay.co.uk/5-SURFLEX-STEEL-CLUTCH-PLATES-BSA-C10-C11G-C12-A7-A10_W0QQitemZ360028758583QQihZ023QQcategoryZ108839QQtcZphotoQQcmdZViewItemQQ_trksidZp1742.m153.l1262?_trksid=p1742.m153.l1262


Is that correct?
I have ony 3 friction plates and steel plates.
Have 1 tick and 4 thin, right?

oh, i don't have the petrol taps too, i put one of some honda motorcycle.
Suggestions?


Many thanks.

[beezalex]

Senor Loco,

Those springs look a little spindly to me....don't really know if they're right, kinda hard to tell.  I'd buy from Draganfly or Domiracer to be sure.

BTW, you should have five friction plates, five thin steel plates and one thick steel plate at the back.  I assume the set on ebay does not include the thick back plate.  Hope that helps.

[a10 gf]

DT, in addition to evaluating the ebay stuff, maybe download tha catalogues from f.ex http://www.draganfly.co.uk/ and http://www.srm-engineering.com/ and send them some email questions. Lots of good reading, and I'm sure you'll end up ordering much more than clutch parts! If you prefer to deal with USA, maybe someone here can recommend dealers.

Sorry for hijacking the thread, but I have to ask, what's the special dynamo and ignition arrangement ?

e

[BSA_54A10]

As stated earlier your clutch is too small for an A10 and could very well be from an M or C series which have fewer plates ( because they have a lot less power) .
While the plates are all the same, the baskets & centers are different lengths to accomodate the different number of plates.
The thick plate goes at the front in the belief that it should go there to spread the pressure from the pressure plate evenly.

If you need to replace the sprockets as well you would be better off replacing the entire 6 spring job with the latter and much better 3 or 4 spring clutches.
 

[trevinoz]

Trevor, it is a plunger bike. A bit hard to put any other clutch in.
Trev.

[BSA_54A10]

Should have looked at the photo a bit harder before posting,
Either the glasses or the brain obviously need attention.

[Daniel Toro (DT)]

Thanks, i'll search on the suggested links.

But the doubt whit the cover continues, if i buy one, how can i fix?
Doesn't need to have something to attach the bolts?

A10gf, I awnser your question on a new post.

[a10 gf]

Here's the complete clutch, also try a search for clutch from the main forum page, you'll find lot's of posts.
& take a look here http://www.a7a10.net/forum/index.php?topic=348.0

e

http://www.a7a10.net/forum/index.php?action=dlattach;topic=919.0;attach=2192;image

[a10 gf]

yup, here's one showing all plates, and another showing detailed parts. (from service sheet 208 & 211).
And let me add that a well adjusted 6 spring works perfect.

[RichardL]

It makes me wonder what a three or four-spring clutch feels like, not having eperienced one, since my six-spring also appears to work jsut fine (I have no way of knowing if it's "perfect.").

Richard L.

[a10 gf]

That's easy to spot, no slip or drag, + smooth clutch handle and smooth gear shift.

[LJ.]

... and this is the difference between the early six spring clutch, which is so smooth and a joy to use, and the later six spring clutch which can be a downright devil to set up and operate! A later four spring clutch is also a joy to use and is very similar in operation to the early six spring. Yes there is a three spring clutch out there and also the big single spring one found on War Department M20s.

[a10 gf]

lj, thanks for the info, didn't know there were several 6 spring incarnations, must be the later one that is the source for the criticism that we read about now and then.

[LJ.]

The two types of six spring clutches was only brought to my realisation a short while ago, thanks to Brian who mentions it in another thread a couple of weeks ago. In the past I was struggling to understand why so many liked the six spring and yet so many hated it! Of course, now I realise there were two! early and late, both different in construction and I belive it is the inner part that is responsible. Looking closely at the early one it is a better and much more solid construction than the later cheaper one. Who knows, there may even have been other variations between these two.

[beezalex]

I wouldn't use "early" and "late" to distinguish the two six spring clutches since this is only true as it applies to A10's.  The wet six spring clutch with the crappy stamped center hub (the main reason why it's stink-o) was actually used BEFORE the dry clutch in the plunger A-series appeared in other bikes.  Perhaps "Dry 6-spring" and "wet 6-spring" would create less confusion.

Now, DT, if your clutch does not have the tin flange as shown in the drawing, you cannot attach the cover, though it is hard to imagine how someone could have fitted the wet-type six-spring clutch to a plunger gearbox mainshaft.  On top of that, there's no other BSA that used duplex chainwheel that would fit.  From that, I can only draw the conclusion that it is a plunger clutch and someone deliberately removed the flange.