Originally Posted by marcelm

Thank you all for the replies, your knowledge is realy helping me.

I want to do a lot of mods to my new (for me) `87 Softail, kickstarter only, open belt drive, new fuel & oil tank ... etc and give a much clean look of the bike, as possible.

I understood that for a kickstart only bike, a small 12V battery, maybe 4Ah, will run just fine with the stock alternator & regulator and with the Dyna S ignition.
Means, the stock regulator & alternator will not fry the small battery. I will have no extra electric stuff, just turn signals, headlight & tail light.

Thank you
Marcel

Originally Posted by TwiZted Biker

I've kicked over a 88" shovel with the dyna-s using two 9v transistor batteries in series when i left the key and killed the battery. Bike fired right up and ran fine on the charging system till battery came back up. If all you doing is using the battery as an exciter and lights when running find a small 12 volt lithium battery, factory charging system will work fine as is.

And yes the dyna-s makes all the difference in this case, stock or most other electronic ignitions have 1 or 2 dead revs before firing, the S doesn't.

Originally Posted by t150vej

The battery will only accept the amperage it needs to come up to full charge regardless of it's, or the charging systems size.

That's a 22 amp system if it hasn't been changed. If a regulator fails, it could fry a diesel truck size battery given time, so just put that out of your mind. Headlamp, brake/tailight, dash lights will only amount to about 5 amps.

Originally Posted by Racepres

Not a Function of the Battery tho... a function of something called the Regulator
Saying a Battery will Not accept an Overcharge is misleading...Plenty (too Many) batteries have been destroyed (even blown up) by Overcharging...Unregulated Charging!!!