Charging system - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 11 (permalink) Old 06-30-2012, 02:01 PM Thread Starter
Senior Member
 
Join Date: Jul 2009
Posts: 686
iTrader: (0)
 
Charging system

95 degrees and, at 75 mph, just keeping pace with traffic for approx. an hour....temp needle pointed straight down in gauge....Voltmeter happy.
Pull up to stop light and notice charging system isn't charging at idle...rev it up to 2K...still not charging....light turns green...off we go...system starts charging approx. 3K. Everything running fine but I'm curious....next light same thing. Get to destination and let the bike cool down....start it up...charging at idle.
Conclusion....for reasons I hope someone here can explain, the charging system is not as effective when bike is hot....just fine when cool. What does this indicate??
VoIPDoc is offline  
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 06-30-2012, 02:09 PM
1986 VN750
 
thtanner's Avatar
 
Join Date: Nov 2011
Location: Dana Point, CA
Posts: 3,255
iTrader: (8)
 
Garage
Quote:
Originally Posted by VoIP Doc View Post
95 degrees and, at 75 mph, just keeping pace with traffic for approx. an hour....temp needle pointed straight down in gauge....Voltmeter happy.
Pull up to stop light and notice charging system isn't charging at idle...rev it up to 2K...still not charging....light turns green...off we go...system starts charging approx. 3K. Everything running fine but I'm curious....next light same thing. Get to destination and let the bike cool down....start it up...charging at idle.
Conclusion....for reasons I hope someone here can explain, the charging system is not as effective when bike is hot....just fine when cool. What does this indicate??
Have you relocated your R/R? If not, that would be my first step! It sits right above the goats belly by default, which gets really hot.

There are tons of different relocation threads that are done differently. Just do a quick search and you'll find tons of info!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
thtanner is offline  
post #3 of 11 (permalink) Old 06-30-2012, 03:37 PM Thread Starter
Senior Member
 
Join Date: Jul 2009
Posts: 686
iTrader: (0)
 
Quote:
Originally Posted by thtanner View Post
Have you relocated your R/R? If not, that would be my first step! It sits right above the goats belly by default, which gets really hot.

There are tons of different relocation threads that are done differently. Just do a quick search and you'll find tons of info!
Ah, no need. GB came off day one when Cruzers were installed.
Thanks.
VoIPDoc is offline  
 
post #4 of 11 (permalink) Old 06-30-2012, 04:08 PM
Senior Member
 
pittdave's Avatar
 
Join Date: Mar 2012
Posts: 441
iTrader: (3)
 
Im in the same boat and notice the same thing. Ive asked the same question about the R/R and Cruzers. Its been said the R/R still gets plenty hot even with the GB gone. Haven't moved the R/R yet but probably will soon

Pittsburgh Dave
2001 VN750...old ride
2003 VN1600.. new ride
pittdave is offline  
post #5 of 11 (permalink) Old 06-30-2012, 04:14 PM
Members who have donated towards server costs
 
JM2001's Avatar
 
Join Date: Mar 2011
Location: Rochester, New York
Posts: 1,803
iTrader: (1)
 
Your fan is probably coming on at the stop light drawing extra amps, then when you get to 3000 rpms the air flow is cooling the radiator and the fan shuts off. When you got to your destination the bike cooled down, no need for the fan to come on, charging was fine. JMO

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier

Last edited by JM2001; 07-01-2012 at 08:44 PM.
JM2001 is offline  
post #6 of 11 (permalink) Old 06-30-2012, 06:14 PM
Senior Member
 
ifixf18s's Avatar
 
Join Date: Sep 2010
Location: Jacksonville fl
Posts: 458
iTrader: (0)
 
Is everything original on the bike? From what ive read on here the charging/electrical system on this bike is a bit weak. When you test the charging system with a meter your suppose to bring up the RPM's to about
4K.
ifixf18s is offline  
post #7 of 11 (permalink) Old 07-01-2012, 06:07 PM
Senior Member
 
Chuck A.'s Avatar
 
Join Date: Nov 2010
Posts: 1,623
iTrader: (1)
 
Garage
Hey its all good. Charging system takes a few seconds in the 2000+ rpms when its good and hot. You should be in range with all the vn 750s out there. You just don't know all this is you don't have a light, meter, or guage.
Chuck A. is offline  
post #8 of 11 (permalink) Old 07-01-2012, 08:32 PM Thread Starter
Senior Member
 
Join Date: Jul 2009
Posts: 686
iTrader: (0)
 
Quote:
Originally Posted by JM2001 View Post
Your fan is probably coming on

I didn't consider this....I think you're right. Today....90+ degrees, 2 Up, 1 hour...same thing.
Curiosity solved.
Thanks all!
VoIPDoc is offline  
post #9 of 11 (permalink) Old 07-03-2012, 02:30 PM
Sparky!!!
 
slimvulcanrider's Avatar
 
Join Date: May 2008
Posts: 8,695
iTrader: (3)
   
Garage
first question I have, Where is your voltage indicator plugged in at, is it wired via a relay strait to the battery? If it is hooked up like many people do to the Brown wire, you aren't getting an accurate reading when the fan comes on. second have you put a multimeter on the bike at idle with the engine warm. The Windings of the stator might be going bad, hence a hot check and cold check in my flow chart. It sounds like you have a couple things going on, first your volt gauge is hooked up wrong, second your stator isn't putting out 12.5+ at idle when hot due to deteriorating windings or a week rotor, and third the combination of both. Test the Stator VAC output when the bike is hot and fan running at idle, 1500 rpm, 2500 rpm, 3500 rpm, and 4500-5000 rpm. At idle you should be seeing around 60 VAC, any thing less and the stator is shot, and at 4500-5000 rpm you should be near 80 VAC,
slimvulcanrider is offline  
post #10 of 11 (permalink) Old 07-03-2012, 02:41 PM
1986 VN750
 
thtanner's Avatar
 
Join Date: Nov 2011
Location: Dana Point, CA
Posts: 3,255
iTrader: (8)
 
Garage
Quote:
Originally Posted by slimvulcanrider View Post
At idle you should be seeing around 60 VAC, any thing less and the stator is shot, and at 4500-5000 rpm you should be near 80 VAC,
I would expect 20-30 at idle, not 60

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
thtanner is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

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
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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