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View Full Version : Smallest battery on cone shovelhead?



Superduper
06-10-2017, 3:10 PM
Hey guys,

So I tried running a brand new 3.5ah battery on my cone shovelhead (running only headlight/tailight and Dyna electronic ignition), but lights got weaker out after some minutes of running. Eventually lights almost died completely out, and bike would not start with lights on, just lights off. Pretty sure my battery is too small. So wondering what the smallest ah I can run is?

Tattooo
06-10-2017, 5:26 PM
Hey guys,

So I tried running a brand new 3.5ah battery on my cone shovelhead (running only headlight/tailight and Dyna electronic ignition), but lights got weaker out after some minutes of running. Eventually lights almost died completely out, and bike would not start with lights on, just lights off. Pretty sure my battery is too small. So wondering what the smallest ah I can run is?


What's wrong with running a correct battery for your bike???? You will have no problems then.... Just wondering???

Superduper
06-11-2017, 1:02 AM
Would not fit. Motor is sitting in a wishbone frame with horseshoe tank. So limited with space for the battery.

Tattooo
06-11-2017, 6:46 AM
Would not fit. Motor is sitting in a wishbone frame with horseshoe tank. So limited with space for the battery.

Ok now that makes since..... Just kick right?? I have one that I got from Batteries plus that has been in the bike for 3 years. I don't remember the number but it barley fit....

vonhelmet
06-11-2017, 9:47 AM
Whatever you do, DONT use an Anti Gravity battery.

Tattooo
06-11-2017, 12:32 PM
Mine is a duracell.....

Jeremy24
06-12-2017, 6:06 AM
Whatever you do, DONT use an Anti Gravity battery.

why? never used one, but now I curious

triumphbruce
06-12-2017, 6:59 AM
i would check the output from the regulator

Sky
06-12-2017, 7:24 AM
group four agm batt paired with a 17 amp charging system
mine is tucked in between the trans and rear fender. accessible and unobtrusive.
cheap and available almost anywhere
better make sure you are indeed charging first.
use a known good fully charged battery for your charging system tests.
keep in mind that overcharging can be a big problem with smaller batteries.

lithium batteries aren't quite ready for prime time
i would only use one with a lithium specific reg-rect. and nobody makes one of those to my knowlage

Tattooo
06-12-2017, 7:44 AM
why? never used one, but now I curious

Because they ain't worth a fuck in a bike...........

Dragstews
06-12-2017, 8:14 AM
Mine is a duracell.....

77380

Tattooo
06-12-2017, 8:34 AM
77380

I don't think they make them for Motorcycles............. But?????

XbrooklynX
06-12-2017, 8:36 AM
Get a mag and ditch the battery all together.

Jeremy24
06-12-2017, 9:26 AM
Because they ain't worth a fuck in a bike...........

good to know for future refrnce

humancertainty
06-12-2017, 11:42 AM
My Antigravity battery is on it's third season and still running strong.
A half dozen of the guys in the shop I share have been running them from one to four seasons and no one has had a single problem.

Tattooo
06-12-2017, 1:51 PM
My Antigravity battery is on it's third season and still running strong.
A half dozen of the guys in the shop I share have been running them from one to four seasons and no one has had a single problem.

You should consider yourselves very lucky..... Many people have a lot of problems with them... Several here on CC in the past week....

humancertainty
06-12-2017, 2:32 PM
You should consider yourselves very lucky..... Many people have a lot of problems with them... Several here on CC in the past week....

Yeah. Maybe so. I have been following what folks have been saying but my personal experience has been 100% positive.

heyyodho
06-13-2017, 6:08 PM
i would check the output from the regulator

You should take this advice because I am running a smaller battery than yours with no problem.

http://www.oreillyauto.com/site/c/detail/SSBC/GTX4LBSJ/N0058.oap?ck=Search_N0058_-1_2593&pt=N0058&ppt=C0393#

Sky
06-13-2017, 8:40 PM
thats the style I'm talking about. size 4 AGM.
Storytime, on the road with that battery and a 32 amp charging system. headlamp blew
without the (aprox)15 amp draw from the headlight bulb, cooked the battery. had to keep the revs up at stops to stay running. and it got progressively worse
made it to an auto parts store. new batt and bulb ran me 45 bucks with the core.
reg-rect was toast. it was working to hard on my minimal chop and that "big" ol' 32 amp setup. luckily i had a spare...

moral , size the charging system to the expected load

skrimp
08-28-2018, 11:51 PM
hey has anyone figured this out? im trying to run a kick only 81' shovel in a kraft tech frame with a softail oil bag. i need a battery no tallers than 5" could probably go up to 5.5
sounds like anti gravity may have fixed the exploding battery problem.. looking for something close to stock output to avoid some of these other issues ive heard from people running batteries too small.

DustyDave
08-29-2018, 12:36 AM
In 2012 the high dollar exocitic chemistry battery I bought for a contest build died immediately. Since I was desperate I stole the battery I bought for a computer UPS it was a UB1245 I used it until this summer. I bought 2 more of the high dollar batteries for my other bike then realised that the UB was way better. They are 3.54" long 2.76" wide and 3.98" high less than $20.00 Hell I got then in everything that is kick start now. I've got one in a bike with a 60 amp alternator and solid state ignition and one in a 25 amp alternator and points . I do run headlights all the time.
Dusty

farmall
08-29-2018, 6:52 AM
Love the UPS battery idea. Anything labeled "motorcycle" gets a ripoff markup.

TriNortchopz
08-29-2018, 7:53 AM
I ran these guys on my brits and my Z-1s and KZ1100 for years, never a problem with kickstart (but they do have a shelf-life):
86858
The Lucas 2MC capacitor was developed in the late 1960s to replace models that featured the energy transfer (E.T.) ignition. Using a Lucas capacitor allows a standard ignition motorcycle to run battery less. The whole purpose of fitting a Lucas capacitor originally was for emergency purposes only. Example - If you left your lights on on your motorcycle and your battery goes flat, the Lucas capacitor will allow you to start your motorcycle and ride it to a close destination. Once the bike is running lights are fully functional - just like E.T. systems. Many folks today install the Lucas capacitor on British motorcycles, European motorcycles and Japanese motorcycles just so one can ride the bike without a battery.
https://www.classicbritishspares.com/blogs/news/product-review-lucas-type-2mc-capacitor-54170009

Replacement made by Sparx here:
https://www.lowbrowcustoms.com/british-standard-capacitor-battery-eliminator-replaces-lucas-2mc-54170009.html

"...If you decide to replace your 2MC and keep your motorcycle completely original, then it’s very
important that you get a freshly manufactured unit. The ageing process that causes the problem
happens regardless of whether the capacitor is sitting on a stock room shelf or installed on a
motorcycle. In other words, a “new old stock” capacitor could be “bad” even though it was still
untouched and in the box. If you are unsure of the quality of the capacitor your local bike shop has,
then you can look for a 4500-microfarad electrolytic capacitor rated at 30V from an electronics
supply house."
http://gabma.us/wp-content/uploads/2015/09/2mc_warning.pdf

CarlBrain
08-29-2018, 10:08 AM
Third season with this.
Kick only with points.
$12.
https://www.atbatt.com/power-sonic-ps-1212-12v-1-4ah-sealed-lead-acid-battery-22/