Sophomore Rider
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Post by gingel on Dec 27, 2013 11:08:02 GMT -5
Hi,
I have a problem when the scooter is cold, and i start it, the charging voltage is almost the battery voltage when scooter is off.
after about a minute, it's starting to raise to around 13.5v (when rev up the engine).
I thought maybe the R/R is not good so i replaced it, but still the same.
What else can i check?
Thank you.
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Post by alleyoop on Dec 27, 2013 12:19:46 GMT -5
That is normal, don't forget as soon as you hit the start button it draws a lot of juice from the battery. Then as soon as the motor starts it starts to make electricity and starts charging the battery.
Alleyoop
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Sophomore Rider
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Post by gingel on Dec 27, 2013 13:15:10 GMT -5
Hi,
Thank you for the quick reply.
I had this even when the battery was new (Lead Acid type) .
Although i think the voltage reached up to 14.3v when rev up the engine.
But it also took a few minutes to get to 14v charging voltage.
Now, i replaced the battery to a Lifepo4 type, which have a voltage of 13.2v when scooter is off.
Even after a 30 minutes ride, the charging voltage is still around 13.5v when rev up the engine.
Is 13.5v is enough?
Thank you.
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Post by tvnacman on Dec 27, 2013 13:15:11 GMT -5
The hard starting could be a valve adjustment . What is the temperature where you live ?
John
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Post by alleyoop on Dec 27, 2013 14:43:18 GMT -5
Optimum charge from your charging system is 14.5-14.7 at RPMS. Problem is you can buy several R/R's before you hit one that actually puts out that much. But yes 13.5 is good enough and is keeping up with juice being used.
Alleyoop
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Sophomore Rider
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Post by gingel on Dec 27, 2013 16:00:36 GMT -5
My scooter is made by SYM, and i purchased a genuine R/R .
(which is actually cost just a little more than a none genuine).
So it supposed to be at SYM specification.
It can't be a problem with the stator, right?
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Post by alleyoop on Dec 27, 2013 16:29:35 GMT -5
No, if it was your stator it wouldn't even put out. Genuine from China, unless it says made in Twain it is a Chinese made part.
Alleyoop
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Sophomore Rider
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Joined: Jun 1, 2013 5:11:09 GMT -5
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Post by gingel on Dec 28, 2013 7:47:38 GMT -5
I did some testing today.
All the tests were with the new R/R . (Btw on the package it says "made in taiwan")
I installed the old Lead Acid battery back in the scooter, and i started it with the kick starter because the battery
don't have enough power to start the engine, although the voltage of the battery is 12.5V .
Immediately after the engine started i measured the charging voltage, and i got 14.3v and up to 14.54 when rev up the engine.
Now, i installed again the Lifepo4 battery (which have 13.2v on rest), and i started the scooter, and the
charging voltage i get is 13.3v to 13.35v when rev up the engine.
Are these Lifepo4 cells work different with the charging voltage?
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..BAD TO THE BONE..
