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Post by leo on Mar 14, 2011 19:18:57 GMT -5
within the last week or so ive noticed my battery will drain so much that i can't start my scoot after sitting for a single day.
i have charged the battery, connected the negative and put both positives in a pair of pliers, held the pliers against the positive post then started the scoot. i then removed the pliers from the battery and the scoot stayed running. this indicates the alternator is working.
i was riding the other day when the scoot started missing really bad. backed off on the throttle and it idled smoothly. i shut off the scoot to determine what the problem was and found the battery was so discharged the solenoid chattered when i tried to start it.
got the scoot home, recharged the battery and reconnected it, pulled the positive off the battery and measured the voltage between the post and the wire. found i was dropping about 5 volts.
i have narrowed the problem down to the rectifier/regulator and alternator.
any guesses about how likely its the alternator? it's inside the engine.
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Post by tvnacman on Mar 14, 2011 19:36:18 GMT -5
get it started again with a fully charged battery and measure the voltage at the battery at idle and reved up , also read the voltage on the battery after a complete charge out of the scooter .
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Post by leo on Mar 15, 2011 13:10:19 GMT -5
the battery measures roughly 12.5-13 volts after it has been charged.
i haven't tried to determine the alternator output at high revs.
i have a spare starter. i will use it to see if there is a dead cell in my battery. be right back.
okay, i couldn't find my starter but i did find a dash fan. specs: 12V 0.8A at 10 watts. i hooked up the fan and voltmeter to the battery and ran the fan for 30 minutes. there was no drop in battery voltage. i doubt if the battery is defective.
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Post by tvrtko1995 on Mar 15, 2011 19:44:44 GMT -5
Check grounding of engine and every "-" point! Start from battery- to the ground point of the frame. It should read ZERO "0" at the lowest setting of ohm-meter or close to zero. Paint might make resistance... Shake all connectors and measure again...
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Post by leo on Mar 15, 2011 20:54:43 GMT -5
i will find out tomorrow. i just got back from the chinese supply house with a rectifier/regulator ( $30 ). i will install it tomorrow, supposed to be pretty nice. i am really itching to go on a 100 to 150 mile ride. thank you jesus for good weather!
edit: okay, the rectifier/regulator was the source of my battery drain. i unfortunately found out why it failed, there is a problem in my headlight circuit. with the headlights off the scoot will idle and rev perfectly. when i turn on my lights the scoot will idle fine but when i open the throttle it starts missing really bad.
suggestions?
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