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From: "Mungo "Two Sheds" Toadfoot" on 6 Sep 2007 09:10
The r/r on my Virago has the following printed on it: '42X-A0' and
'SH569-12'.

This one on eBay:
http://cgi.ebay.co.uk/Yamaha-FZR250-3LN-RECTIFIER-FZ-250-FZR-400-SH569-12_W0QQitemZ330158149685

....has the same lower number but the top one is '47X-A1'.

What do the different codes signify?

--
Si - XV535


From: Mark Olson on 6 Sep 2007 09:34
Mungo "Two Sheds" Toadfoot wrote:
> The r/r on my Virago has the following printed on it: '42X-A0' and
> 'SH569-12'.
>
> This one on eBay:
> http://cgi.ebay.co.uk/Yamaha-FZR250-3LN-RECTIFIER-FZ-250-FZR-400-SH569-12_W0QQitemZ330158149685
>
> ...has the same lower number but the top one is '47X-A1'.
>
> What do the different codes signify?

No idea, but I can tell you most PM alternator shunt regulators will
happily interchange without any fuss, aside from the obvious problems
with mounting hole locations and connector pin mismatches. Three wires
carry AC from the stator, two wires bring DC to the battery.[1] Of
course some are more robust than others, I'd make sure a replacement R/R
can dissipate at least as many watts as the original.

[1] Some regulators also have a voltage sense wire that is intended to
be connected to a switched 12V source, so the regulator can 'see' the
system voltage without having to rely on the voltage it can sense on the
wire that carries the current to the battery. This allows the regulator
to precisely hit the desired voltage despite the voltage drop that
occurs when sourcing large amounts of current to the system. On my
GL1200A I re-routed that sense wire directly to the positive battery
terminal[2], since there was considerable voltage drop across the
ignition switch and the many connectors in the system, which resulted in
the battery not seeing a sufficient voltage to keep it fully charged.

[2] drain was minimal, in the microamp range.

--
'01 SV650SK1 '99 EX250-F13 '98 ZG1000-A13
OMF #7
From: Albrecht via MotorcycleKB.com on 6 Sep 2007 09:57
Mungo "Two Sheds" Toadfoot wrote:

>What do the different codes signify?

They could be date codes, signifying when the lot of regulators was
manufactured, or they could be different internal configurations or wiring
connectors.

Ebay sellers certainly do offer items at attractive prices, though, if you
can sort out all the differences and whether the item is any good at all.

Got Stirling? It might be worth the money to be sure you're getting a good,
reliable new part.

XV535 RR

http://www.electrexworld.co.uk/erol.html#731X0

FZR250, FZR400 RR

http://www.electrexworld.co.uk/erol.html#3330X0

--
Message posted via MotorcycleKB.com
http://www.motorcyclekb.com/Uwe/Forums.aspx/tech/200709/1

From: "Mungo "Two Sheds" Toadfoot" on 6 Sep 2007 15:17
Mark Olson wrote:
> Mungo "Two Sheds" Toadfoot wrote:
>> The r/r on my Virago has the following printed on it: '42X-A0' and
>> 'SH569-12'.
>>
>> This one on eBay:
>> http://cgi.ebay.co.uk/Yamaha-FZR250-3LN-RECTIFIER-FZ-250-FZR-400-SH569-12_W0QQitemZ330158149685
>>
>> ...has the same lower number but the top one is '47X-A1'.
>>
>> What do the different codes signify?
>
> No idea, but I can tell you most PM alternator shunt regulators will
> happily interchange without any fuss...

<Snip>

Thanks chaps. I think I'll mount it somewhere other than right above the
exhaust too!

--
Si - XV535


From: Mark Olson on 6 Sep 2007 18:16
Mungo "Two Sheds" Toadfoot wrote:
> Mark Olson wrote:
>> Mungo "Two Sheds" Toadfoot wrote:
>>> The r/r on my Virago has the following printed on it: '42X-A0' and
>>> 'SH569-12'.
>>>
>>> This one on eBay:
>>> http://cgi.ebay.co.uk/Yamaha-FZR250-3LN-RECTIFIER-FZ-250-FZR-400-SH569-12_W0QQitemZ330158149685
>>>
>>> ...has the same lower number but the top one is '47X-A1'.
>>>
>>> What do the different codes signify?
>> No idea, but I can tell you most PM alternator shunt regulators will
>> happily interchange without any fuss...
>
> <Snip>
>
> Thanks chaps. I think I'll mount it somewhere other than right above the
> exhaust too!

A friend of mine has a CPU fan attached to the reg/rect (from a Honda
VF1000F IIRC) of his V-Max, after suffering repeated failures from
overheating.

--
'01 SV650S '99 EX250-F13 '98 ZG1000-A13
OMF #7
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