The Sportster and Buell Motorcycle Forum - The XLFORUM®

Go Back   The Sportster and Buell Motorcycle Forum - The XLFORUM® > SPORTSTER MOTORCYCLE ZONE > Sportster Motorcycle Electrical > Sportster Motorcycle Electrical and Ignition
XLF Blogs XLF Arcade XLF Disclaimer/Privacy Statement/Terms Of Use

Active Threads
0 Average age of the Ironhead forum users
Last Post: Martysf
Posted On: 1 Minute Ago
Replies: 403
Views: 65,430
0 Iree's late night cafe
Last Post: Graywolf
Posted On: 29 Minutes Ago
Replies: 781
Views: 65,447
0 Solar battery charging
Last Post: drumbrake
Posted On: 1 Hour Ago
Replies: 1
Views: 30
0 Iree's jukbox joint
Last Post: rubine
Posted On: 1 Hour Ago
Replies: 4,814
Views: 234,788
0 Oil change 101 – Engine and Transmission oil change pics
Last Post: Twistedrench
Posted On: 2 Hours Ago
Replies: 140
Views: 539,828
0 Cartridge Conversion?
Last Post: sml1226
Posted On: 3 Hours Ago
Replies: 14
Views: 226
0 Primary Oil INSANITY!
Last Post: sml1226
Posted On: 3 Hours Ago
Replies: 34
Views: 2,956
0 1977 Ironhead clutch arm moves but wont shift.
Last Post: GrimKvlt
Posted On: 3 Hours Ago
Replies: 17
Views: 513
0 5/12/18 - WILD RABBIT MOTO SHOW 3 - Cambridge, MA
Last Post: tvon
Posted On: 3 Hours Ago
Replies: 0
Views: 36
0 4/29/18 - New Tradition Company swap meet - Worcester, MA
Last Post: tvon
Posted On: 4 Hours Ago
Replies: 0
Views: 34
0 '03 883 Hugger Odd Clutch feel, 1st gear jumps out
Last Post: Wharfcreek
Posted On: 4 Hours Ago
Replies: 11
Views: 292
0 Anyone still use Cycle Shack duels?
Last Post: jkinkade
Posted On: 5 Hours Ago
Replies: 10
Views: 215
0 1979 oil routing diagram
Last Post: Jorgem79
Posted On: 6 Hours Ago
Replies: 2
Views: 74
0 Mid's or rear sets
Last Post: madnss
Posted On: 6 Hours Ago
Replies: 15
Views: 10,910
Members Birthdays
Sponsored Links
Share Thread Tools Display Modes
Old 22nd July 2012
kj_walther kj_walther is offline
Join Date: May 2012
Posts: 74
Sportster/Buell Model: ironhead
Sportster/Buell Year: 1975
Reputation: 22
kj_walther is an unknown quantity at this point
Default charging system mystery?

heres the bike
1975 harley davidson Ironhead (bobber)
brand new battery, brand new delco mechanical voltage regulator, generator has new brushes and springs installed and tested pushing 10 amps, brand new key switch, all new wiring, dyna s dual fire ignition with stock ironhead 5 ohm coil......

now the mystery is... why in the heck will my battery not charge? lol everything is brand new beisdes putting a brand new generator in it, but the generator tests good according to the clymer manual. bike will start and run but when i test the battery after a long ride it has 8 volts and if i turn on my headlights it will kill the bike.

Yes i have polarized the generator by touching battery + to arm..........

i have no horn, no blinkers, just a tail lamp and a headlamp...... i know the bike is wired correctly as well.......

if anyone knows of some mystery that i dont know about, please let me know.... if i test from positive to negative with the bike running i should have 13 volts correct? mine only has 12 and like i said will drop over a long ride.
Reply With Quote
Old 25th July 2012
FasTnNefariouS FasTnNefariouS is offline
Join Date: Jul 2012
Posts: 10
Sportster/Buell Model: Sportster
Sportster/Buell Year: 1981
Reputation: 10
FasTnNefariouS is an unknown quantity at this point

With everything checking out A-OK, it sounds like damaged wire you just can't see. Strip it down and check everything again. It's the hidden things that usually cause these problems. I had a charging system problem not too long ago and also swore everything was working and wired up correctly. I found that 1 wire caused the problem. That's all it takes. The charging system is very simple, but without actually seeing the bike, it makes it difficult for us to know exactly what's going on since you claim everything is brand new and installed properly. Check for loose crimps on the wire ends. Check for loose or missing hardware and all is properly secured. Grounds are connected to raw metal. Good luck and when you do find the problem, please update us.
Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links
All times are GMT +1. The time now is 10:21.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
XL Forum® - Linson Media LLC