bike dont hold a charge?

bike dont hold a charge? 22 Apr 2008 12:17 #208262

kustompup93 Topic Author Offline User Posts: 19 Thank you received: 0	its an 81kz550c i have 2 out the battery tender/charger on it every night 2 fully charge the battery. anyone know why my bike wont recharge itself? is the rectifier bad or the magneto? need help!
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bike dont hold a charge? 22 Apr 2008 12:33 #208270

Qdude Offline User It is all good. Posts: 650 Thank you received: 1	Take the battery in to get it checked. 77 KZ 650 C1. 77 KZ 650 C1. Crashed-Repaired, Pods, Kerker pipe, re-wired core bundle, lamp upgraded, homemade rectifier, solid state regulator , Dyna-s ignition, repainted, slightly modified, year-round commuter Honda Metro 85 mpg Scooter. Dont laugh I will throw it at you
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bike dont hold a charge? 23 Apr 2008 12:29 #208493

kustompup93 Topic Author Offline User Posts: 19 Thank you received: 0	my battery seems 2 be fine, so wat else would it be? the rectifer? or magneto?? something?? need help
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bike dont hold a charge? 23 Apr 2008 12:35 #208495

BSKZ650 Offline User Posts: 2064 Thank you received: 14	you need to put a volt meter on the battery when it is running to see if it is charging or not, that will be the starting point 77 kz650, owned for over 25 years 77 ltd1000, current rider 76 kz900, just waiting 73 z1,, gonna restore this one piglet, leggero harley davidson SR, Ride captian, S.E.Texas Patriot Guard Riders.. AKA KawaBob
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bike dont hold a charge? 23 Apr 2008 14:18 #208507

bountyhunter
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Easy way to test the battery: let it charge on the tender until it's topped off. Put a volt meter on it and crank test it: pull your spark plug wires off the plugs and crank the starter. A good battery will hold 9V or higher under starter crank test (higher is better).

If the battery is good and you get no charge, it has to be the rectifier/regulator assembly or the magneto assembly.

1979 KZ-750 Twin

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bike dont hold a charge? 23 Apr 2008 16:46 #208539

OKC_Kent
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To build on to what BSKZ650 wrote:

Quoted below from the Electrosport site, hope it helps.

"Any well working charging system on a modern bike will produce a voltage over the battery terminals in between 13.5V DC and 14.5V DC, over the entire rev range. When you suspect a fault in the system, this is the first thing to check.

When you find that there is a problem, keep in mind that the number 1 problem with any charging system are bad connections."

www.electrosport.com/technical-resources...lt-finding-guide.php

Oklahoma City, OK
78 KZ650 B2 82,000+ miles