Author Topic: Magneto advance/retard  (Read 6477 times)

Offline a10gf

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Re: Magneto advance/retard
« Reply #15 on: 01.04. 2010 09:58 »
Quote
which way round would that condenser go
No polarity.
& see this post.


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Offline LJ.

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Re: Magneto advance/retard
« Reply #16 on: 01.04. 2010 11:03 »
Thanks Erling... Yes did find that post and have just spent a good half hour going over it again. Likely there will be more questions in time when I get round to doing the job.

Cheers!
Ride Safely Lads! LJ.
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1940 BSA M20 500cc Girder/Rigid- (SOLD)
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Offline MG

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Re: Magneto advance/retard
« Reply #17 on: 01.04. 2010 18:15 »
LJ,
There is no polarity for the condenser, like Erling said, but watch out not to exchange the two wires coming out of the armature. Both are connected to the condenser, but one of them is also connected to the armature body!
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Offline LJ.

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Re: Magneto advance/retard
« Reply #18 on: 01.04. 2010 18:56 »
Thanks for that Erling & Markus... I've taken a good look over my spare magneto today and feel I'd like to have a go at replacing the condenser as now I understand that it does not matter which way round the wires go, it sounding quite easy to do.

I've looked at that link you posted earlier aimed at helping Groily, and although I managed to get a webpage translation the purchasing wont work via the translated page, hmmmmff. Now I'm wondering if you know of any decent enough Austrian guy who might like to earn a beer or two?? (hint hint).
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 MG

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Re: Magneto advance/retard
« Reply #19 on: 01.04. 2010 19:40 »
Well, I have a very close and dear Austrian friend who is a bike enthusiast and for sure has some of the condensers stored in his workshop. I bet I can persuade him to send you one or two. ;)
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1956 A10 Golden Flash
1961 Matchless G12 CSR

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Offline dpaddock

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Re: Magneto advance/retard
« Reply #20 on: 22.04. 2010 20:04 »
This post started as a question re magneto advance/retard, so I"ll ask my question accordingly:

     Do any on the forum have information re the shape of the advance curve for the K2F Auto Advance Unit, Lucas p/n 47503D/E?

Thanks.

David
David
'57 Spitfire


Offline muskrat

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Re: Magneto advance/retard
« Reply #21 on: 23.04. 2010 19:18 »
G'day David,
                 as it's spring and bobweight affair the advance should be linear. EG 0 rpm = 0 adv, 1000 rpm = 10 deg adv, 2000 rpm = 20 deg adv, 3000 rpm = 30 deg adv. These figures are example only, not sure of exact. Modern bikes with elec ign have more of a curve and also vacume and temp figures into the equation.
Full adv at 4000 rpm should be 32-35 deg, at idle about 10 deg.
Cheers
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