Regulator Problem, Not Sure. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 04-25-2009, 02:58 PM Thread Starter
IBEW 915 Electrician
 
hctublerub's Avatar
 
Join Date: Jul 2008
Location: Z-Hills, FL
Posts: 115
iTrader: (0)
 
Regulator Problem, Not Sure.

I've been tracking this for a while wondering if I have a stator or regulator problem. Today I took one of those cheap digital meters ($20) you get from Home Depot, put spade lugs on the leads, hooked to battery, and ty-rapped it between the tach and speedo.

Took the bike out and the numbers were good. 13.8-14.0v. After about five minutes of running the numbers suddenly dropped to about 12.5 and began to go lower. The battery drained close to 12v by the time I pulled into the drive.

I had hooked up an O-scope earlier and saw what I thought to be a sizable AC ripple across the battery.

The bike also stalls at idle even with the good voltage so I think there are some other issues. Starts up quick, though.

After reading the Vulcan verses I think this is the regulator.

Butch

'01 Vulcan 750
Irridium Plugs
MF Battery
hctublerub is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 04-25-2009, 05:56 PM
The Professor
 
lance328's Avatar
 
Join Date: Feb 2008
Location: BUFORD, GEORGIA
Posts: 3,147
iTrader: (15)
   
Quote:
Originally Posted by hctublerub View Post
I've been tracking this for a while wondering if I have a stator or regulator problem. Today I took one of those cheap digital meters ($20) you get from Home Depot, put spade lugs on the leads, hooked to battery, and ty-rapped it between the tach and speedo.

Took the bike out and the numbers were good. 13.8-14.0v. After about five minutes of running the numbers suddenly dropped to about 12.5 and began to go lower. The battery drained close to 12v by the time I pulled into the drive.

I had hooked up an O-scope earlier and saw what I thought to be a sizable AC ripple across the battery.

The bike also stalls at idle even with the good voltage so I think there are some other issues. Starts up quick, though.

After reading the Vulcan verses I think this is the regulator.

Butch

Do some more rides with the meter, I think your R/R is fine. Sometimes at low rpm it can dip below 12v.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
lance328 is offline  
post #3 of 6 (permalink) Old 04-25-2009, 10:05 PM
and the Adventure Cycle
 
hyperbuzzin's Avatar
 
Join Date: Jun 2004
Location: Western PA
Posts: 6,138
iTrader: (1)
   
Also, pay attention to when the voltage drops to see (or listen) if the fan is running, maybe while the brake is being applied too?
The fan & brake together will put a pretty good drop on the voltage.


AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC


"When life throws you curves,
Aim for the apex."

Author Unknown
hyperbuzzin is offline  
 
post #4 of 6 (permalink) Old 04-26-2009, 01:15 AM Thread Starter
IBEW 915 Electrician
 
hctublerub's Avatar
 
Join Date: Jul 2008
Location: Z-Hills, FL
Posts: 115
iTrader: (0)
 
The dip occurred as I pulled away from a stoplight and never recovered. There were stops before that happened and the voltage remained OK. On one of my earlier rides I pulled into the drive and the engine stalled. The battery was too weak to restart the engine. As it stands now I can't really ride the bike too far from home.

The bike is firing a bit uneven at the lower rpms even though it seems to have power.

I'll take the bike out a few more times and pay more attention to what I am doing when this occurs.

Put into the Kawasaki dealer a few months back and they come up with zero after a day of "diagnostics". It cost me $133.

'01 Vulcan 750
Irridium Plugs
MF Battery
hctublerub is offline  
post #5 of 6 (permalink) Old 04-26-2009, 03:54 AM
The Professor
 
lance328's Avatar
 
Join Date: Feb 2008
Location: BUFORD, GEORGIA
Posts: 3,147
iTrader: (15)
   
Check all battery, solenoid, R/R, stator and ground connections.

How old is your battery and what type?


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
lance328 is offline  
post #6 of 6 (permalink) Old 04-26-2009, 11:24 PM Thread Starter
IBEW 915 Electrician
 
hctublerub's Avatar
 
Join Date: Jul 2008
Location: Z-Hills, FL
Posts: 115
iTrader: (0)
 
Battery is a new Westco MF AGM. I bought the charger offered with it and it seems a good match. The charger can be left on the battery without overcharging.

'01 Vulcan 750
Irridium Plugs
MF Battery
hctublerub 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