2021 ultra - battery fail
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,921
Likes: 8,027
From: poway
Won't the Ultra take a GYZ32HL? Still not the same battery tho.. I'd expect that if Yuasa had an issue with leadwing batteries, it would be confined to that particular model of battery.
Thread Starter
|
Tourer
Joined: Apr 2016
Posts: 336
Likes: 181
From: West Central MN
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,921
Likes: 8,027
From: poway
Some tenders won't charge a battery if it's low.. Need to get one that will to over an amp..
I'm not too hot on leaving tenders connected to AGM batteries. If their float voltage is off or the charger can't put out enough to achieve absorb mode, the charger can dry out the battery. They are OK for flooded as you can always add water. With everything right it's not an issue but some of the cheaper or lower amp ones can kill the AGMs.
I'm not too hot on leaving tenders connected to AGM batteries. If their float voltage is off or the charger can't put out enough to achieve absorb mode, the charger can dry out the battery. They are OK for flooded as you can always add water. With everything right it's not an issue but some of the cheaper or lower amp ones can kill the AGMs.
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,475
Likes: 3,000
From: Charleston, SC
Use a Tender or not, but whatever you do, when you go in there hoping for HD to give you a new battery... save yourself the trouble and say your bike has been on a tender everyday and twice on Tuesdays. 
Seasoned HDF Member
Joined: Sep 2009
Posts: 25,310
Likes: 2,446
From: Eastern NE
Never kept the older bikes on a tender, save for winter. I ride pretty much every day it's not raining. if a battery can't keep a charge for 12 hours then IMO something's wrong with the vehicle or the battery. However, yeah, gotta drop the bike overnight for them, called them and apparently they've had a number of 21's in already for the same issue. it is what it is I guess.
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
Club Member
Joined: Apr 2016
Posts: 11,578
Likes: 8,406
From: Inland NW
I would still check all the connections.
Mine did the same thing after 1 year, I fully charged it and tested it with a MidTronics battery tester...failed.
Go with a smart charger like a NoCo
Stellar HDF Member
Joined: May 2014
Posts: 2,486
Likes: 695
From: Huntington Beach, CA
Not necessarily so. If you only do short rides the battery may be draining more during intervals than charging during rides. Eventually it will discharge. This sounds like what maybe happened to you. I always use a tender at home and have had no battery issues.