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You can buy a cheap Digital Multimeter at Harbor Freight if you have one in your area. Costs about $6 or if you get it on special you can even get it free with any other purchase. Take it and check battery voltage while the bike is running. Should be 13v or higher at idle, then if you rev it up should go up to like 14v or higher. You can even check for current draw while the bike is off. Set the multimeter to measure amperage then connect the meter in line with the negative post of the battery. Disconnect the negative post, then attach one of the probes from the meter to the battery and the other to the wire that connects to the battery- so you have it in series with the circuit. This will show you whats called "parasitic draw" or what the bike is drawing from the battery when it shouldnt be drawing anything. Let us know what you find, I'm curious! =)
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