Join Date: Jan 2014
Location: South Central PA
Basically, a late Harley has draw all the time, keeping the electronics partially powered. But everything is fused except the starter.
To draw a good battery flat in a few days is a large draw. I would suggest a inductive amp meter in place of the light bulb, then repeat your tests. Get a base line for the draw, and then start pulling fuses.
There are a couple of systems that need to be isolated, so as to rule them out. Remove the battery cable from the solenoid to isolate the starter. Then unplug the regulator from the battery to isolate the charging system.
You may find that there is not a large draw after you turn the scooter off, only to come back 8 hours later and find that there is now a draw. Regulator or Radio would be the suspects there.
Before you make all the effort of chasing a draw, test that battery. Charge it fully and then load test it per the manufactures specs. Then pull it down at least 25% and charge test it. You stated that it went over 13 volts sitting. That tells me it might fail the charge test, or you need a better meter. It should not stay above 12.6-12.7 after just sitting for a few hours, disconnected.
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