Author Topic: timing wheel?  (Read 5739 times)

Offline orabanda

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Re: timing wheel?
« Reply #30 on: 17.01. 2010 22:34 »
Some of my A10 mags have the carbon brush in the back of the brass plate, some don't.

Offline MG

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Re: timing wheel?
« Reply #31 on: 18.01. 2010 06:54 »
Hm, funny. Maybe there had been a version without the front earthing brush available at some time? That would be the only reason making sense to me. Might also have been an "universal" points plate for different mags, one without any other earthing brush.
Where is Joseph Lucas when you need him...?
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Offline LJ.

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Re: timing wheel?
« Reply #32 on: 18.01. 2010 09:53 »
Joe and his 'dark' secrets eh?  ;)
Ride Safely Lads! LJ.
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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
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Re: timing wheel?
« Reply #33 on: 18.01. 2010 12:03 »
If he is where a lot of riders wished him over the years it would be very hot.
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Offline MG

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Re: timing wheel?
« Reply #34 on: 18.01. 2010 12:05 »
Quote
If he is where a lot of riders wished him over the years it would be very hot.

...and dark
1955 A7 Shooting Star
1956 A10 Golden Flash
1961 Matchless G12 CSR

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Austria

Offline LJ.

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Re: timing wheel?
« Reply #35 on: 18.01. 2010 14:12 »
... But someone else says... "Let there be light"! and there was light, and everything was good. If only it was 'that' easy Joe.  *lol*
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: timing wheel?
« Reply #36 on: 18.01. 2010 14:34 »
Did you guys know that Lucas built vacuum cleaners once? It was their only product that did NOT suck.
1955 A7 Shooting Star
1956 A10 Golden Flash
1961 Matchless G12 CSR

www.histo-tech.at - Restoration, Repairs, Racing

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Online groily

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Re: timing wheel?
« Reply #37 on: 18.01. 2010 17:47 »
I think we're too hard on Uncle Joe sometimes. He made his stuff to suit the tightwads at the factories - they could have had better quality and better longevity, but I reckon they didn't think we were worth it. In light of that, Uncle Joe's magnetos do work pretty well, or I think they do anyway. Even our under-sized over-stressed little dynamos aren't all bad, although I don't think much of the regulators myself.

I don't know why some brass cb backplates have the brush fitting either - just that some of them do. Never seen a K2F without the standard earth brush either.

As a lot of folk here have said a few times, the first thing to do with any newly-acquired beast of unknown provenance is to get the mag rewound, sort the charging out from end to end, and you're half way to having a reliable bike. I've no idea what the stats are, but I bet well over half of all classic breakdowns bar punctures are down to optimism winning out over prudence in the electrical department. (I know mine have been!)
Bill

Offline MG

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Re: timing wheel?
« Reply #38 on: 18.01. 2010 17:58 »
groily - absolutely agree. We have to bear in mid that these things are 50+ years old. I want to see today's motor control unit or microprocessor-ignition-module in 50 years. Well, maybe I even will...
1955 A7 Shooting Star
1956 A10 Golden Flash
1961 Matchless G12 CSR

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Offline trevinoz

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Re: timing wheel?
« Reply #39 on: 18.01. 2010 21:42 »
If you have a look at the Lucas parts book, all brass point plates have an earthing brush and spring.
It must have been unnecessary as it was dropped when the steel plates were introduced.
If my points don't have a brush, I don't worry about it and fit them anyway.
As already stated, the brush plate makes contact with earth through the shaft.
Trev.

Offline olev

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Re: timing wheel?
« Reply #40 on: 18.01. 2010 22:29 »
Did you guys know that Lucas built the first English fridges?
and thats why they drink warm beer.

Offline emilios

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Re: timing wheel?
« Reply #41 on: 19.01. 2010 17:58 »
If you have a look at the Lucas parts book, all brass point plates have an earthing brush and spring.
It must have been unnecessary as it was dropped when the steel plates were introduced.
If my points don't have a brush, I don't worry about it and fit them anyway.
As already stated, the brush plate makes contact with earth through the shaft.
Trev.
But if brass point plate makes contact with earth through the shaft...what for is spring with brush there??
It doesnt make any sense to me.
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Offline a10gf

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Re: timing wheel?
« Reply #42 on: 19.01. 2010 18:21 »
Quote
all brass point plates have an earthing brush and spring
nope!
Am also interested in the answer to the riddle (why some with and some without?)

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