Bob LaRosa

Understanding the Harley-Davidson Battery & Charging System

Bob LaRosa
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Duration:   3  mins

Unless you have a kickstart, you’ll need a battery to get your Harley started and to keep it functional. With that can come some Harley-Davidson charging problems.

Bob shares some tips on battery replacement and upkeep. Batteries have come a long way since we shot this video. HD makes a great one but make sure to check out Yuasa and the lighter longer-lasting lithium batteries made by several companies.

Here’s another look and a great project for newer Twin Cams:

Go back to school and learn all about Harley Electronics with this project:

Electrical Systems

Make sure to review all Maintenance Videos for your make and model.
Milwaukee Eight Touring
Touring Maintenance Twin Cam and Evo
Trike Maintenance
Milwaukee Eight Softail
Softail & Dyna Maintenance Twin Cam and Evo
Sportster Maintenance

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5 Responses to “Understanding the Harley-Davidson Battery & Charging System”

  1. Ronald Crowe

    I have a 2015 tri glide is it important that the cc be 400 or can it be cc 385?

  2. Damon

    Hi Guys Im having problems with starting my 2010 Harley nightster. ! day it will start and everything is fine. Then I go to start her next day and all it does it turn over, wont start..any ideas?

  3. terrienelson64

    I have an 08 Sportster 883 I have had the stator check and it checked out fine the regulator checked out bad I replaced it. I had to charge the battery up then I drove it approximately 3 miles it was cutting out like it wanted to die after I got it home and turned it off it started back up but the next morning when I went to start it it just click click click click

  4. Timothy

    Hello, I've recently purchased a '91 FLHTC and I'm having done low voltage issues. The bike always cranks over and starts fine, but while idling the volt meter on the dash will go as low as 8 volts. While driving, the volt meter will sometimes read 12, sometimes 12.5. This is all done with the passing lights and stereo on. If I turn off the passing lights alone, the volts go up to 13 and stays there. My question is, should I and can I put a larger amped charging coil in to replace the stock 18 currently in it? Thank you

  5. Kevin

    How much compression can the OEM starter handle on a 03 Roadking. Just put a 95in.Kit in it and decked the heads .040 with a over size exhaust valve. Having intermittent trouble cranking. Just installed new AGM battery and problem still exists.

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