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Post by finaljudgement on Dec 30, 2012 21:00:21 GMT -5
I have a 2008 SYM HD200. Lately I need a jump to start after riding for a while. The battery checked out OK when tested. I checked the voltage at idle; it was 13.8 volts. I then twisted the throttle and the voltage dropped to 12.3 volts. I repeated this sequence several times with the same result. Battery is keep on a battery tender when in the garage overnight.
Any thoughts why the voltage would drop with the increased rpms? I would expect the opposite.
FinalJudgement
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Post by tvnacman on Dec 30, 2012 21:07:02 GMT -5
check the ac output of the stator .
John
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Deleted
Deleted Member
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Post by Deleted on Dec 31, 2012 1:36:34 GMT -5
Charging system malfunction, it could be as simple as a visual inspection may reveal a wire come loose, while there inspect the fuse, also check all those electrical connections and make sure each and every one of them is "seated."
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Post by rapidjim on Dec 31, 2012 9:51:20 GMT -5
I would suspect the voltage regulator or a loose plug
Jim
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Post by Blueboy5000 on Jan 1, 2013 7:28:08 GMT -5
Voltage Regulator. 90% of the time this is what causes this problem.
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Post by finaljudgement on Jan 17, 2013 19:18:23 GMT -5
I checked the stator and it was fine. I had the battery rechecked...this time it tested bad. Put a new battery in today and all is well.
Thanks for your input
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Post by skuttadawg on Jan 18, 2013 0:02:28 GMT -5
How to test the regulator other than it has flow ? I do not know the volts and amps required and I am sure it varies with amount of poles in the stator
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Post by prodigit on Jan 23, 2013 19:44:09 GMT -5
I'd presume there's a charging issue.
Disconnect the battery, and the scooter stalls (which should not be).
Try revving the bike to 3-4k rpm, and keep it there. does the voltage come up, or stay low?
The spark plugs can drain the battery voltage, when the stator does not charge them.
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