VT1100 C-another charging issue - Honda Shadow Forums : Shadow Motorcycle Forum
 
LinkBack Thread Tools
post #1 of 5 (permalink) Old 04-28-2014, 10:22 AM Thread Starter
Member
 
Flying Greg's Avatar
 
Join Date: Aug 2013
Location: West Chester, OH (Cincinnati)
Posts: 262
VT1100 C-another charging issue

Battery died and left me stranded last week. Recharged battery and checked voltage while grinding starter and voltage did not drop below 11.0V so i think battery is OK. Checked voltage at battery while bike is running and have 14.1 at idle, drops to 12+/- while holding steady at about 3500 rpm then suddenly drops to about 6-9 V after about 30 seconds at higher rpm. Is regulator engaging and reducing voltage to battery because it us fully charged, or do I have some other problem?

I will be checking the yellow wires under the seat for burned or corroded connections that I have seen on this forum, but I am concerned about the voltages at the battery at 3500 rpm. I think they should be higher.

I have also been reading about upgrading the regulator/rectifier to an aftermarket MOSFET unit. Any thoughts about this is also appreciated.

Greg


...Nothing in moderation...

Greg
Flying Greg is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 04-28-2014, 10:43 AM
Member
 
Join Date: Nov 2011
Location: Virginia Beach, Virginia
Posts: 327
They should kind of work the other way around but within a more tolerable spec. It should be somewhere in the neighborhood of 13 - 14 volts at idle and higher to a peak of less than 15v at 5k rpms. You're r/r is no good, its shunting voltage when it shouldn't hence you're low reading. Replace it with a newer MOSFET style r/r and you will be good to go.

But if you want to be more thorough to make sure your stator is good, check AC voltages across the yellow wires (2 at a time) and it should be around 20vAC at idle and upwards of 50-60vAC around 5k rpms. If that checks out, then it is your r/r for sure.

Damian


Image is pointless if you don't do the riding part; get out on the road and out of the bar!

'00 Sabre

damian.garcia83 is offline  
post #3 of 5 (permalink) Old 04-28-2014, 10:48 AM
Member
 
Da Skipper's Avatar
 
Join Date: Oct 2007
Location: Northern Virginia
Posts: 507
Check the three yellow wire connections and stator. If they all check out ok, then I recommend the Mosfet upgrade. Even with a new battery, I was still using a battery tender regularly during the riding season, with the stock R/R on my Sabre. After the Mosfet upgrade, I have not needed the battery tender at all. Battery stays charged. I also added a digital voltmeter to keep an eye on the voltage. The Mosfet R/R solved my charging system weakness.


2000 Shadow Sabre VT1100 C2
Da Skipper is offline  
 
post #4 of 5 (permalink) Old 04-28-2014, 11:20 AM
Senior Member
 
adlowe's Avatar
 
Join Date: Jun 2006
Location: Southeast Michigan
Posts: 9,024
Garage
Quote:
Originally Posted by Flying Greg View Post
...or do I have some other problem
You need to go through the diagnostics to find out. All we can offer is guesses and opinions.

Sounds like you have a voltage meter. Is it a multimeter? Or do you have one? If not, get one. (Digital is better but analog will work just fine.)

This post has some links to diagnostic how-to videos.



Art's 1999 Shadow 1100 ACE (Ride bell by Dr. Bob's Patient)





adlowe is offline  
post #5 of 5 (permalink) Old 04-28-2014, 08:42 PM
Junior Member
 
Join Date: Mar 2014
Location: Spring, TX
Posts: 20
i had a charging issue on my 99 ace 750, went with the mosfet upgrade and glad i did, no problem starting and charging. one of the better upgrade for your bike
AZIAN69 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda Shadow Forums : Shadow Motorcycle Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Another Charging Issue tendrew7 Technical Discussion 7 09-04-2014 06:30 PM
'94 Shadow VT600 Battery Charging Issue Spamcan Technical Discussion 10 06-05-2010 10:05 PM
charging issue hondaadventure Technical Discussion 11 06-02-2010 09:40 AM
Battery charging issue TomVa43 Technical Discussion 5 04-05-2010 11:17 PM
Help!!? Older Shadow... Charging Issue.. All New Stuff! sdowiat Technical Discussion 12 12-08-2009 07:44 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome