The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Gearbox, Clutch, Primary => Topic started by: peter on 05.04. 2011 10:32

Title: clutch
Post by: peter on 05.04. 2011 10:32

Hello,
My BSA 1954 Swingingarm 6 Spring clutch owned  4 driving plates Nr.65-3857 and 4 sheet plates 65-3824. Is it coreckt? Or should it have 5 Plates?
Greets Peter

Title: Re: clutch
Post by: Goldy on 05.04. 2011 11:07

I went through this subject when I built mine. As far as I am aware A10/A7 has 5 steel and 5 friction. I think it,s the B33 that had 4 plates and in my case I had the wrong clutch basket so 5 plates would not go on. All the best.

Title: Re: clutch
Post by: peter on 05.04. 2011 19:29

Thanks for your replay Goldy , I think my clutch basket could be for 5, it has enough space,the clutch is not working well, bad gear change and often a little slip in the clutch,  i think she needs 5 plates.
Peter

Title: Re: clutch
Post by: beezalex on 05.04. 2011 21:50

Peter, here's a little table I put together to try and suss out the different six-spring clutches BSA had.  Hope it helps:
BSA Wet six-spring clutches

Year39-5339-4049-5549-5349-5449-5358-595454-57ModelCMMB31B32-B34GSGSB32/34 Rig compA s.a.Clutch basket65-391966-390866-389165-392266-390866-390842-322442-305442-3054No. of plain plates244344   555No of friction plates2443445   55

(Let me know if you find any errors or you an fill in some of the omissions, there are undoubtedly a few)

Title: Re: clutch
Post by: dpaddock on 05.04. 2011 22:49

Good stuff, Alex - thanks.

David

Title: Re: clutch
Post by: peter on 06.04. 2011 21:42

Alex,thank you for the list it is very good for me.As I can see i have the wrong clutch in my BSA.
Today I have the clutch actuating cap grounded and polished plan, it was totally uneven.
now the clutch and the gearbox works for the first time well.
I have filled in chaincase an Car-Automatic Oil, it should be good, I have read it anywhere in this forum.
 I riding the bike for 3 hours and all works verry well.I`m happy now.
English is a difficult language :-))  :-))
Peter