Re: nighthawk 550 electrical problem
- From: "R. Pierce Butler" <spamsucks@xxxxxxxxxx>
- Date: Thu, 22 Sep 2005 23:13:16 GMT
"R. Pierce Butler" <spamsucks@xxxxxxxxxx> wrote in
news:Xns96D9B73F778B6mc2500183316chgoill@xxxxxxxxxx:
> "krusty kritter" <kriyamanna@xxxxxxx> wrote in
> news:1127401009.010428.255190@xxxxxxxxxxxxxxxxxxxxxxxxxxxx:
>
>>
>> jlpridge wrote:
>>> I recently (last week) purchased this motorcycle. IT runs well with a
>>> fully charged battery. However after I ride it for awhile and then
>>> park overnight it does not seem to want to run well at all. In fact
>>> the battery dies and the bike will not even start. I do not leave the
>>> key on or in it overnight. When I jump start it the bike starts up and
>>> as soon as I disconnect the jumper cables it dies. I do not want to
>>> start blindly replacing stuff. Please help. I do like this bike.
>>
>> You need to start educating yourself on permanent magnet alternators
>> and shunt type rectifier regulators and the typical Honda problems with
>> bad electrical connections and too damned many of them.
>>
>> I've written about a hundred thousand words on the subject and they are
>> all archived on Google, so you might try doing a google search for some
>> of my older e-mail addresses, like "kaybearjr@aol", and
>> "spectraltarsier@aol" +permanent magnet alternator and diodes and read
>> up on the subject, because I'm NOT going to type all that stuff out
>> again and I don't plan to put up a web page either.
>>
>> And, you'd better start hoping that the problem is just bad electrical
>> connections, a defective rectifier regulator, or an old sulfated
>> battery that won't take a full charge, because the 1983 CB-550
>> Nighthawk was a glorious ONE YEAR ONLY model, and the aftermarket folks
>> DO NOT make a replacement stator for the weird alternator with its
>> 2-piece permanent magnet rotor.
>>
>> If nobody knows where you can get a good used stator (like a motorcycle
>> salvage yard, I wish you lotsa luck finding one for such a rare
>> motorbike), Honda will sell you a new one for about $275...
>>
>> Also, google the internet for "stator +CB550 Nighthawk". Somebody
>> probably knows more than me about Nighthawks.
>>
>> Electrosport and other companies do make aftermarket voltage
>> regulator/rectifier assemblies for your Nighthawk.
>>
>> Some information about troubleshooting motorcycle charging systems can
>> be found here:
>>
>> http://www.electrosport.com/05_technical_start.html
>>
>> It may be more confusing than helpful. If I hadn't been to electrical
>> tech school, I would get anything at all out of their diode testing
>> procedure.
>>
>> An exploded view of the weird split rotor alternator with its air
>> cooling fan can be seen at www.partsfish.com. Just register and you can
>> look at the alternator parts fiche for free.
>>
>> I was trying to figure out how the alternator was driven, whether by
>> gear or chain, but it's unclear from the drawing. However it's driven,
>> the rotor MUST BE TURNING to charge the battery!
>>
>> One of the things that the instructors attempted to pound into our
>> thick skulls at electrical tech school was that an alternator rotor
>> must be ROTATING in order to generate any juice, but a whole generation
>> of aircraft electricians was often fooled by that part of the
>> troubleshooting process. I've only run across one alternator whose
>> rotor wasn't turning though. It's something to keep in mind.
>>
>>
>
> What will blow your mind is a brushless alternator. That's right. No
> brushes at all. It is an interesting design and it is one that I wish
> had had more of a following.
>
> pierce
>
BTW when I mean brushless I don't mean a permanent magnet alternator
either. It has a field coil, stator, etc. but no brushes.
pierce
.
- References:
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- From: jlpridge
- Re: nighthawk 550 electrical problem
- From: krusty kritter
- Re: nighthawk 550 electrical problem
- From: R. Pierce Butler
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