Dyna Battery

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Dec 17, 2021 | 08:40 AM

#11

Architect

Seasoned HDF Member

Joined: Apr 2010

Posts: 9,404

Likes: 7,624

From: Long Island, New York

Quote:

Originally Posted by hd4evr2008

I guess my main concern is the fact that it tests that's fully charged. My head lights and dash lights are nice and bright, but when I hit the start button the battery sounds dead. Just wondering if that was normal for a bad battery.

Unfortunately, yes it is normal to show good for the test but be otherwise dead for starting a MC. Many a forum member has chased their tails looking at connections, starters, fuses, etc., etc. and their battery was just old and done. It happens, they do not last forever even on a tender. Personally I like the factory batteries, never had an issue with them. Good luck.

Dec 17, 2021 | 09:08 AM

#12

John CC

HDF Community Team

Joined: Aug 2018

Posts: 2,970

Likes: 1,166

From: New Hampsha

Check the voltage at the battery before and during the start attempt. If it is good before and unchanged during, then the starter is not being powered for whatever reason. If it is good before and bad during then either the battery is bad or the starter is drawing too much current. If it is bad before and worse during then the battery needs to be charged or replaced.

Dec 17, 2021 | 09:46 AM

#13

Qdog002

Grand HDF Member

Joined: Nov 2012

Posts: 3,513

Likes: 885

From: Upstate New York

Quote:

Originally Posted by hd4evr2008

This is exactly what happened to me. Battery was at 13.9v when installed with lights on. Multimeter read 7.9v when I went to start it. It needs to read at least 9.6v when starting. That`a how I knew I needed a new battery.

Dec 28, 2021 | 08:43 AM

#14

Gunter77

Cruiser

Joined: Jul 2017

Posts: 167

Likes: 46

From: Valley of the Sun

Quote:

Originally Posted by Lorddaftbiker

If it's the original battery, it's 9 years old. It doesn't owe you anything at this point. Stock HD batteries are underpowered IMO. A 10 horse lawn tractor has more CCAs. I went with the YUASA above. Was thinking of going with a scary flammable lithium ion battery for more power but didn't bother because 1, Scary flammable, 2, need a special charger, and 3, they lose their chi if drained too low/aren't good for cold weather. Would like to hear if anyone is running one of these and likes it.

Lithium Iron Phosphate is the new idea- more stable than Lith Ion. Giving one a try on my 107". So far so good, 600 CCA turns her over right sharp, and shaved another 12lbs off running weight, living in phoenix area now cold not a big concern