| CB350F charging problems [message #495389] |
Sun, 30 October 2005 18:13 |
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Hello,
My first bike was a '79 CB650, I cured it's charging problem by changing
the rotor with one, I thought from a CB550. The CB650 was a bored out
CB550.
At any rate, I'm trying to figure out what's causing the charging
problems on a '72 CB350F. According to the not-very-good Clymer manual
I have for this bike it doesn't look like the rotor is anything but a
rotating magnet, like on my current Norton. I haven't yet opened up the
cover, does anyone know if this is this the case? It appears that this
alternator has a rotor, a stator, and a field coil.
My old Honda had carbon brushes connecting the rotor with the rest of
the charging system, I'm not sure if the rotor was a collection of
electromagnets in that case, or if it was functioning like the stator in
my Norton's electrical system. I understand that some alternators work
this way. If the rotor is a collection of electromagnets, is there any
was of testing the rotor. For instance, should it have continuity to
ground? They give ways of testing the field coil and stator, but not
the rotor. Is the rotor just some permanent magnets like on my Norton then?
-Eric
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| Re: CB350F charging problems [message #495391 ] |
Sun, 30 October 2005 19:51 |
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In article <eb79f.2326$m81.2174 [at] newsread1.news.atl.earthlink.net>,
E Goforth <gogo [at] fake.com> wrote:
> Hello,
>
> My first bike was a '79 CB650, I cured it's charging problem by changing
> the rotor with one, I thought from a CB550. The CB650 was a bored out
> CB550.
>
> At any rate, I'm trying to figure out what's causing the charging
> problems on a '72 CB350F. According to the not-very-good Clymer manual
> I have for this bike it doesn't look like the rotor is anything but a
> rotating magnet, like on my current Norton. I haven't yet opened up the
> cover, does anyone know if this is this the case? It appears that this
> alternator has a rotor, a stator, and a field coil.
>
> My old Honda had carbon brushes connecting the rotor with the rest of
> the charging system, I'm not sure if the rotor was a collection of
> electromagnets in that case, or if it was functioning like the stator in
> my Norton's electrical system. I understand that some alternators work
> this way. If the rotor is a collection of electromagnets, is there any
> was of testing the rotor. For instance, should it have continuity to
> ground? They give ways of testing the field coil and stator, but not
> the rotor. Is the rotor just some permanent magnets like on my Norton then?
>
> -Eric
Some suggestions (in no particular order):
1. search this group's archives. This very issue has been discussed
quite a bit, and recently (last 2-3 months) too.
2. Get the electrical troubleshooting/fault-finding chart from
http://www.electrosport.com
It's a helpful thing to have around.
3. Get the Honda manual for the bike. THey are, IME, far better than the
any of the aftermarket manuals that I've seen. In the USA, you buy new
from www.helminc.com (just like your dealer would-they're the sole US
distributor), or you search eBay (craigslist, or wherever)for a used
copy.
HTH.
--
Later,
John
johajohn [at] indianahoosiers.edu
'indiana' is a 'nolnn' and 'hoosier' is a 'solkk'. Indiana doesn't solkk.
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| Re: CB350F charging problems [message #498681 ] |
Fri, 04 November 2005 01:28 |
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Assuming that this is the four cylinder 350 ( has a different type
alternator than the twin ), it has an inductive field alternator where a
doughnut electromagnet induces magnetism remotely into the field rotor.
This type of alternator has proven extremely reliable on old Honda
fours. The most likely culprit is the mechanical voltage regulator ( I
am assuming the same setup as the other Honda fours of the period ). On
the plus side, most of the mechanical regulators can be fixed- take off
the cover and look for dirty contacts or even broken jumper wires. Hope
this helps....Brady T.
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| Re: CB350F charging problems [message #507901 ] |
Tue, 08 November 2005 03:28 |
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The rotor and flywheel is a permannent magnent. You cannot take two
different componants and make this work. You will either have a
charging problem or a firing problem.
It want work.
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| Re: CB350F charging problems [message #507902 ] |
Tue, 08 November 2005 03:28 |
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The rotor and flywheel is a permannent magnent. You cannot take two
different componants and make this work. You will either have a
charging problem or a firing problem.
It want work.
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