Charging Problem on Wife's Bike - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
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post #1 of 18 (permalink) Old 03-18-2011, 11:02 AM Thread Starter
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Charging Problem on Wife's Bike

Hello, all. My wife rides a 99 Savage 650 (she's too short for a VN750, lol) I'm trying to figure out where the new problem lies. Had a new, fully charged agm battery. We went for a 30 mile, stopped to eat, and when returning to the bikes, hers would not start. Jumped it and headed home; ran fine except it would backfire anytime she used signals to change lanes, etc. About half way home, it backfired a couple times and died. I rode home, got the truck and trailer and brought it home and starting checking it out. Battery is on the charger and tests good with my load charger. I'm thinking regulator or stator but I'm not sure exactly how to test them. What do you think? Please keep in mind when it comes to electrical, I'm a tard, so please treat me as such.

2004 VN750 "Rosanna"
Acquired March 6, 2010

Done:
NGK Iridium Plugs
NGK Caps
Big Crank ETX15L AGM Battery
Battery Tender Jr. w/Pigtail
Marbled
Rear Spline Lubed
Front Spine/U-Joint Lubed
Metzeler ME 880's
Brake Fluid Flushed, Filled, and Bled
Saddlemen Studded Saddlebags and Tank Bib
Installed 12 Volt Power Outlet
Debaffled
R/R Relocated flightcontrol Style

Pending
N/A... I'm Going Ridin'
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post #2 of 18 (permalink) Old 03-18-2011, 11:45 AM
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Quick, easy, cheap tests first.
Put the battery back in and fire up the bike.
Check the voltage at the battery terminals at
Idle
3k rpm
4k
5k

Ideally at 5k rpm you should be getting about 14.5v.
You want the voltage to gradually climb as rpm increases.

report back your readings and we should be able to help

Gordon

1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15


TOP TEN THINGS A NEW RIDER/OWNER SHOULD DO. Click on link.
https://www.vn750.com/forum/11-vn750-general-discussion/9127-top-ten-items-you-would-suggest-new-owner-do-his-new-ride.html
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post #3 of 18 (permalink) Old 03-18-2011, 12:06 PM Thread Starter
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Quote:
Originally Posted by OlHossCanada View Post
Quick, easy, cheap tests first.
Put the battery back in and fire up the bike.
Check the voltage at the battery terminals at
Idle
3k rpm
4k
5k

Ideally at 5k rpm you should be getting about 14.5v.
You want the voltage to gradually climb as rpm increases.

report back your readings and we should be able to help
Thanks, Hoss. I'll get out today to find a hand held tach and take the readings.

2004 VN750 "Rosanna"
Acquired March 6, 2010

Done:
NGK Iridium Plugs
NGK Caps
Big Crank ETX15L AGM Battery
Battery Tender Jr. w/Pigtail
Marbled
Rear Spline Lubed
Front Spine/U-Joint Lubed
Metzeler ME 880's
Brake Fluid Flushed, Filled, and Bled
Saddlemen Studded Saddlebags and Tank Bib
Installed 12 Volt Power Outlet
Debaffled
R/R Relocated flightcontrol Style

Pending
N/A... I'm Going Ridin'
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post #4 of 18 (permalink) Old 03-18-2011, 01:20 PM
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If you have to buy a hand held tach, just put the meter on the battery and check voltage at idle, quarter throttle, half, and higher. It should go up to what OlHoss indicated.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
_____________________________________________
"Black Beauty"
1989 VN750 acquired December, 2008, 6,711 miles
Currently 23,298 miles

Old Blue
2001 Honda CMX250 Rebel acquired July, 2008

1987 VN750 project bike, acquired August, 2009, 33,000 miles and balancer sticking out of the case, currently awaiting attention and parts
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post #5 of 18 (permalink) Old 03-18-2011, 03:21 PM Thread Starter
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Quote:
Originally Posted by flitecontrol View Post
If you have to buy a hand held tach, just put the meter on the battery and check voltage at idle, quarter throttle, half, and higher. It should go up to what OlHoss indicated.
Well, FWIW, here's what I've got. Got full charge on battery and reinstalled. The meter shows at rest with the key off: 12.48; with the key on bike not started: 12.04; started at idle: 12.00; here's the strange part, as I throttle up, the voltage drops the more I rev. It's not a consistent drop, it kind of bounces around, but it drops more the more I rev. What says you guys?

2004 VN750 "Rosanna"
Acquired March 6, 2010

Done:
NGK Iridium Plugs
NGK Caps
Big Crank ETX15L AGM Battery
Battery Tender Jr. w/Pigtail
Marbled
Rear Spline Lubed
Front Spine/U-Joint Lubed
Metzeler ME 880's
Brake Fluid Flushed, Filled, and Bled
Saddlemen Studded Saddlebags and Tank Bib
Installed 12 Volt Power Outlet
Debaffled
R/R Relocated flightcontrol Style

Pending
N/A... I'm Going Ridin'
peerless is offline  
post #6 of 18 (permalink) Old 03-18-2011, 03:35 PM
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check all of your grounds.. do the stator wire check.. do the R/R check.
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post #7 of 18 (permalink) Old 03-18-2011, 05:21 PM
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Garage
last time i saw this... both the stator and the r/r were toast
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post #8 of 18 (permalink) Old 03-18-2011, 07:12 PM Thread Starter
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Quote:
Originally Posted by clock152 View Post
check all of your grounds.. do the stator wire check.. do the R/R check.
I completed the "Charging System No-load Performance Test" from page 210-211 in the Suzuki Savage Clymer manual and the stator checked ok. Now check this out! I decided to check the mounting bolts on the regulator and found them a little loose. Now keep in mind I have over the fender saddle bags so the leather is between the regulator and fender. After tightening the bolts, I blow a main fuse every time I rev the engine. I loosened the regulator bolts and no problem with the fuse when I rev. I did this test over and over with the same results. Can I recycle all the blown fuses, lol ? Does this mean anything in regards to the regulator?

2004 VN750 "Rosanna"
Acquired March 6, 2010

Done:
NGK Iridium Plugs
NGK Caps
Big Crank ETX15L AGM Battery
Battery Tender Jr. w/Pigtail
Marbled
Rear Spline Lubed
Front Spine/U-Joint Lubed
Metzeler ME 880's
Brake Fluid Flushed, Filled, and Bled
Saddlemen Studded Saddlebags and Tank Bib
Installed 12 Volt Power Outlet
Debaffled
R/R Relocated flightcontrol Style

Pending
N/A... I'm Going Ridin'
peerless is offline  
post #9 of 18 (permalink) Old 03-18-2011, 08:12 PM
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umm.. yeah you got a hot wire to ground someplace.. or your R/R is shorted out.
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post #10 of 18 (permalink) Old 03-18-2011, 08:29 PM Thread Starter
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Quote:
Originally Posted by clock152 View Post
umm.. yeah you got a hot wire to ground someplace.. or your R/R is shorted out.
I'm betting on the R/R shorted out. I've order a new one, so it will be ruled out soon enough. Hopefully that takes care of the problem.

2004 VN750 "Rosanna"
Acquired March 6, 2010

Done:
NGK Iridium Plugs
NGK Caps
Big Crank ETX15L AGM Battery
Battery Tender Jr. w/Pigtail
Marbled
Rear Spline Lubed
Front Spine/U-Joint Lubed
Metzeler ME 880's
Brake Fluid Flushed, Filled, and Bled
Saddlemen Studded Saddlebags and Tank Bib
Installed 12 Volt Power Outlet
Debaffled
R/R Relocated flightcontrol Style

Pending
N/A... I'm Going Ridin'
peerless is offline  
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