Question about Harley Davidson XL 1200 C Sportster Custom Motorcycles
I charge the battery with a trickle charge bike will run for a few short rides then battery need charging again
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Posted on Jan 02, 2017
SOURCE: bad battery
Don't rely on on whether the bike will start at a gas station to determine if the charging system is working. Get the multimeter out and do a proper test. Should be getting about 14.5 volts @ around 3K RPM. It's too easy of a test to to just skip. If it is charging then start looking for something else. Was the new battery properly charged to begin with? Loose battery connection? I suppose the GPS could be too much but you said that it was dying last november, so I would suspect something else. P.S. you need a properly charged battery to get an accurate reading for the charging test.
Posted on Nov 20, 2008
SOURCE: battery not holding a charge,
Check the charging rate of your bike, see if its system is charging, if it does charge thn theres somewhere the battery is getting drained out.
In order to see if tht is happenning, switch off everything and thn remove one battery wire on the battery, after doing so try to fix it back and notice if theres any sparks when it comes to the contact of the battery terminal , if so thn theres a drain somewhere in the electricals and wiring.
Knight (Yamaha Seca XJ750A 1981)
Posted on Apr 17, 2009
sounds like a regulator...what is the voltage now? try also to trickle charge for about four to five hours...put it back in... if it starts...run the bike up to 4000 rpm and watch the multimeter...it should start to rise to about 14v then go back down to 13v, this means the regulator is doing its job to keep it from overcharging,....if it does all this, then your regulator is good! so its probably a bad battery.
Posted on Sep 16, 2009
SOURCE: if you charge the battery
Unfortunately you cannot check the regulator portion of the regulator/rectifier. The common failure on these units is the stator itself, which is located in the rear of the motor and requires motor removal to replace. If you haven't done so already, check the stator connector (3 pin connector with yellow wires located near the battery). Often these leads develop resistance and get hot and melt the wires in this area. A repair kit is available from Honda with new wires and connectors. However first I would check the stator to be sure it is ok. You can check resistance between each of the yellow wires. The readings should be fairly equal and should have no continuity to ground. If you have continuity to ground, your stator is bad. You can also check AC output between yellow wires with the motor running, you should get voltage readings from about 20VAC at idle that increase to approximately 60-90VAC as the motor is revved up.
Hope this helps.
Posted on Aug 21, 2010
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