[OntVFR] New topic-5th generation charging issues

Brian Polley rbpolley at gmail.com
Sun May 12 13:14:23 EDT 2019


Thanks. Where did you get your part from?

On Sun, May 12, 2019, 10:11 AM mike mckinnon, <2bikemike at gmail.com> wrote:

> I have a 99 and this happened to me twice. Both times it was the rectifier
> only. The high-voltage fried a battery and burnt out headlights. On the
> second rectifier replacement I installed the now infamous computer fan
> connected to the face of the regulator to blow air on it when there's not
> enough air getting into the rear cowl and so far has done its job well over
> the past 8 years since the second replacement.
>
> On Sun, May 12, 2019, 1:04 PM Brian Polley <rbpolley at gmail.com> wrote:
>
>> Hi All,
>>
>> I have a pristine 2000 VFR 800 with about 18K on it. I don’t ride it
>> much—it has become a garage queen.
>>
>>
>>
>> Some time ago I looked at the battery charging voltage. It is charging to
>> 16 volts. I know this is not good. I am getting various tips on trouble
>> shooting regarding the stator and the rectifier. As far as I can tell,
>> performing all these tests my rectifier and stator test good. But they are
>> stock.
>>
>>
>>
>> I have been in discussion with Ricks,
>> http://www.ricksmotorsportelectrics.com
>> <https://www.youtube.com/redirect?event=channel_description&q=http%3A%2F%2Fwww.ricksmotorsportelectrics.com&redir_token=BImr3DCqO887ZxIX_pYMZhzEbKt8MTU1NzUxMjkxNEAxNTU3NDI2NTE0>
>>
>> They have provided some trouble shooting tips, however they have not
>> really spawned any solutions.
>>
>> The following is a procedure that apparently shows the issue and some
>> clue as to why the bike is over charging.
>>
>>
>>
>> Put a volt meter on the battery –start the bike—read the voltage---if
>> over 14.5 volts you have a overcharging issue. Mine is at 16 volts
>>
>>
>>
>> On the static test (bike off) at the battery take a voltage reading, I
>> have 13.75 volts.
>>
>> Keep the neg. DVM  connected to the battery and touch the +ve lead to the
>> control wire in the rectifier connection (small black wire) and turn on the
>> ignition, the voltage  should be the same as the battery and if it is low,
>> (I get 13.3V)  then there is some resistance in the system which forces the
>> stock rectifier to over- charge. I am seeing about .5 V drop with this
>> test. What is normal on other bikes?
>>
>>
>>
>> When I run the bike I get 16.04 V at the battery. If you jumper from the
>> red wire +ve. on the rectifier connection to the black control wire it
>> forces  a proper control voltage to the rectifier and it reduces its output
>> by about .5 volt. This procedure just confirms that the control wire part
>> of the system is not giving the rectifier the voltage it needs to prevent
>> over charging.
>>
>>
>>
>> I have taken the instrument cluster off it’s mount and re connected all
>> of the small connections—(other than the ones to the instrument cluster)
>> and added some dielectric grease to all of the connections.
>>
>>
>>
>> I took of the ignition switch thinking I would take it apart to look for
>> a bad connection. I don’t have the proper tool to disassemble it , but it
>> seems very clean. I put it back on making sure it was well grounded. I also
>> tightened the spade connections on this connector.
>>
>>
>>
>> None of this has helped at all.  It seems there are two options. Replace
>> the ignition switch to see if that is where the resistance is coming from
>> or replace the rectifier and see what happens. I’m not a fan of guess work
>> so hoping someone who has experienced this issue can shed some light on all
>> of this for me.
>>
>>
>>
>> My question to the group is: Has any one ever done all these tests and if
>> yes what were the readings on your bike.
>>
>> If anyone has a 2000 (5th generation) maybe you could share your story
>> and if you did in fact have this issue and how you fixed it.
>>
>>
>>
>> I think that maybe the stock rectifier cannot handle the resistance in
>> the wiring and therefore is over charging. I don’t really know if a new
>> “improved” rectifier will solve the problem or just mask it.
>>
>>
>>
>> Thoughts?
>>
>>
>>
>> Thanks
>>
>> Brian Polley---out west in Kelowna—
>>
>> My direct e mail is rbpolley at gmail.com
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>>
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