Author Topic: The inside of the magneto, should there be a spring ?  (Read 840 times)

Offline Stephen Arsenal

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Bike 97% ready,last question, the inside of the magneto,should there be a spring or something contacting the silver screw on the outside to the inside gubbings?. A cable should then go from the outside screw to the cut out switch ? My mechanic guy put my bike on you tube under BSA 1959 golden Flash,is only 59 seconds but it sounds great.
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Offline LJ.

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Re: The inside of the magneto, should there be a spring ?
« Reply #1 on: 20.03. 2010 17:39 »
Hi Steve... Yes there should be a small spring holding a carbon brush, very similar to the pickups. The carbon brush is then pushed onto the centre nut by the spring to enable earthing and cut out.
Ride Safely Lads! LJ.
**********************
1940 BSA M20 500cc Girder/Rigid- (SOLD)
1947 BSA M21 600cc Girder/Rigid-Green
1949 BSA A7   500cc Girder/Plunger Star Twin-(SOLD)
1953 BSA B33  500cc Teles/Plunger-Maroon
1961 BSA A10  650cc Golden Flash-Blue
1961 BSA A10  650cc Golden Flash-Red

Offline Stephen Arsenal

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Re: The inside of the magneto, should there be a spring ?
« Reply #2 on: 20.03. 2010 21:22 »
Thanks LJ,you would´nt by chance have a picture or diagram of the missing spring/brush by any chance?(rough Dali/Picasso would suffice) cheers-steve
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Offline MG

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Re: The inside of the magneto, should there be a spring ?
« Reply #3 on: 20.03. 2010 21:45 »
There you go, just had a K2F disassembled for overhaul today...

Not quite Dali or Picasso, more of Ansel Adams (well, not really)  ;)
brush diameter 5mm
The cut out button connects the points plate fixation bolt to earth via this brush to stop the engine.

Cheers, Markus
1955 A7 Shooting Star
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