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#470483 - 01/03/13 7:33 am Help with 6 spring clutch bearings - C10L / C11  
Joined: Feb 2006
Posts: 635
Ginge Offline
BritBike Forum member
Ginge  Offline
BritBike Forum member

Joined: Feb 2006
Posts: 635
Qld, Aust and Otago,NZ
Luddites and rivet counters look away....

I have a C10L with a C11 motor in it, 3 speed box and a 6 spring clutch. It was a bike I bought in boxes when I was 15 which was a good 30 year ago. It was a good start in Brit bikes but it just isn't comfortable in it's own skin. Too many bits of different puzzles.

The C11 motor has been rebuilt and is a strong motor. Probably too strong for the frame and brakes. This bike will do 60mph which is quite frightening given the flexible Bantam based frame and skinny brake shoes.

The bike is registered and has been rallied mildly for 10 years and done about 650 miles but the clutch continually gives problems. It drags or is heavy, or it slips under acceleration.

I know the C10L is a side valve, with a 3 spring clutch. I don't have a 3 spring clutch. I need to make the 6 spring clutch work although I don't ask it to cope with 60mph. That just happened one day when I opened the throttle......

Pics below show I have one plain plate and one fibre plate ( maybe 100 miles on each ) plus the original clutch basket ( just recorked for the second time) and a plain backing plate. New clutch springs, push rod and clutch cable at restoration. No bad notching in the basket.

Can anyone tell me whether I can quit the double row ball race bearing in favour of rollers. They are hellishly expensive and the balls fall out whenever I pull the clutch aprt. May indicate the bearing is loaded wrongly? The clutch basket looks like it has a inner bearing surface just like my Triumph clutch basket but the clutch hub is splined so it will need to be changed.

Also, is there a significant difference in the spring force on the pressure plate of the 3 and 6 spring clutches. Am wondering if I am fighting to adjust a clutch which was designed for a much bigger clutch load from a big single or twin.

Pics below show my hub with the expensive 2 row bearing sitting on it, clutch plates and basket.











Would be interested in a basket case C10 motor to rebuild so I can replace the C11 and start to put the bike back as BSA intended.

Thanks and any thoughts are welcomed.


Ginge
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#470493 - 01/03/13 10:15 am Re: Help with 6 spring clutch bearings - C10L / C11 [Re: Ginge]  
Joined: Sep 2006
Posts: 94
Lekkie Offline
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Lekkie  Offline
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Joined: Sep 2006
Posts: 94
England
Sorry I am unable to help with your problem directly, but try posting your question here: http://bsac10c11c12.co.uk/smf/index.php?PHPSESSID=a0007ef8254e2dff7a4d443296cb01ec&


Moderated by  Allan Gill, Jon W. Whitley 


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