not charging
Thread Starter
|
Stage I
Joined: Dec 2025
Posts: 1
Likes: 0
From: FL
not charging
mey bike starts and runs fine and is charging after it warms up the engine light and battery light come on and it starts discharging very quick. does anybody have any ideas. it's a 2009 fat Bob i
Last edited by Pops51; Dec 12, 2025 at 05:10 PM.
Club Member
Joined: Apr 2013
Posts: 5,820
Likes: 3,816
From: Cape Cod
How does it start after the discharge?
Put a meter on the battery while it's running and see what it does.
At 2k rpm and above it should read 14+ volts.
Watch what it does while at idle, should not go down.
If it does, could be the voltage regulator is gone.
Also, have the battery load tested.
Put a meter on the battery while it's running and see what it does.
At 2k rpm and above it should read 14+ volts.
Watch what it does while at idle, should not go down.
If it does, could be the voltage regulator is gone.
Also, have the battery load tested.
Last edited by MURPHCC1; Dec 12, 2025 at 05:21 PM.
HDF Community Team
Joined: Aug 2018
Posts: 3,046
Likes: 1,212
From: New Hampsha
Do the checks above, but, it sounds like when the bike gets warm something starts drawing a ton of current. Could be the regulator/rectifier failing from heat, or something similar. You might try to see if the regulator is suddenly getting hot. Measure the voltage and see if it suddenly drops off.
Last edited by John CC; Dec 12, 2025 at 05:48 PM.
https://www.hdforums.com/forum/elect...sting-1-a.html
https://www.hdforums.com/forum/elect...sting-2-a.html
Trending Topics
Seasoned HDF Member
Joined: Dec 2010
Posts: 6,849
Likes: 1,389
From: Florida
I am betting you are charging a little bit but not enough. That means your stator and voltage regulator are on their way out.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
HDF Community Team
Joined: Jun 2008
Posts: 4,758
Likes: 953
From: Out West
Lots of advice, some unanswered questions and we still don't have any clue as to the color of this fictitious bike!
And to boot, there's probably no stage II cam in it
And to boot, there's probably no stage II cam in it
Last edited by Suede Blue Man; Dec 18, 2025 at 09:55 AM.
