Dim lights & dead battery! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 9 (permalink) Old 04-03-2009, 07:03 PM Thread Starter
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Unhappy Dim lights & dead battery!

A few weeks ago I was gonna go on a nice ride with my in laws and my bike was dead, so i bought a MF battery ('bout time) and it was fine. The bike sat for a few weeks (needed an oil change) when I finaly got the oil changed i took it for a ride and parked it, next day the battery was dead. I got it jumped off but the lights are dim and it wont stay running without the choke! im ****tin bricks thinkin its the stator....any help would be great! Thanks in advance for any help.

2005 VN750
16,000 Miles

HAVE:
V-Force Windshield
V&H Cruzer Pipes
Luggage Rack
Lo-Jack
Intact Toolbox
Avon Venom Tires
Tour Master Cruiser II Slant Bags
K&N Air Filter
Custom Grill



NEED(want)
Engine Guard
16" Ape Hangers
Forward Controls
New Grips
New Mirrors
Driver Backrest
Passenger Backrest
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post #2 of 9 (permalink) Old 04-03-2009, 08:58 PM
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mine just did a similar thing at the end of last year. battery kept dieing so I put a mf on her and it worked for a few good rides but was draining it as well. after about 12 miles of riding it would act like it ran out of gas and would not crank when I tried to restart it. took it in this week and the shop put a new rr on it from rick, they said the stator was testing fine. only rode it home so far cause it got cold again but so far so good. hope you are as lucky. plenty of threads on here for testing it but if you are electrically challenged like me take it in. we just had a new shop open up that deals rokeeta bikes and quads with certified bike mechanics and they only charge 40 an hour opposed to the harley or yamaha shop that rapes you.

1986 vn 750 aka "Huck Farley"
42,000 miles
Rick's stator and rr
Tuxedo stator cover mod
pickup coil mod
dampers replaced
agm m/f battery
Harley sportster exhaust, degoated
Hid conversion
splines lubed
custom "vn750.com" grill cover
NGK Iridium spark plugs


acct to mcct mod https://www.vn750.com/forum/showthread.php?t=17917

rekeying locks, https://www.vn750.com/forum/showthread.php?t=7309

stator replacement walkthrough, https://www.vn750.com/forum/showthread.php?t=11369
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post #3 of 9 (permalink) Old 04-03-2009, 09:08 PM
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Dim lights sounds like a poor ground. Check where the negative cable from the battery is bolted to the frame. Sandpaper or wire brush any rust off the frame and bolt, then reinstall and snug it up tight. Check other connections and grounds for tightness or corrosion. Pack with dielectric grease and reconnect.

How many volts are you getting now when the bike is running?

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

Last edited by OlHossCanada; 04-03-2009 at 09:11 PM.
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post #4 of 9 (permalink) Old 04-03-2009, 09:36 PM
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Put a voltmeter on the battery terminals with it running. Check at idle and 4k rpms. We can go from there.

Jon

93VN750, under re-construction
vn750.com Member # 828

Rick's Stator and R/R
MF AGM Battery
Coastered
Degoated
Shaved & Jetted
Iridium's
MAC Tapered Staggered Pipes
Battery/Temp/Clock Gauge
Stainless Steel Brake Lines
Dunlop D-404's
23,XXX miles and holding pending gasket change (underway!!!)
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post #5 of 9 (permalink) Old 04-03-2009, 11:03 PM Thread Starter
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ok, my brother in law is gonna bring his voltmeter over in the next few days and we are gonna narrow down the problem. any advice as far as what we need to do?

2005 VN750
16,000 Miles

HAVE:
V-Force Windshield
V&H Cruzer Pipes
Luggage Rack
Lo-Jack
Intact Toolbox
Avon Venom Tires
Tour Master Cruiser II Slant Bags
K&N Air Filter
Custom Grill



NEED(want)
Engine Guard
16" Ape Hangers
Forward Controls
New Grips
New Mirrors
Driver Backrest
Passenger Backrest
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post #6 of 9 (permalink) Old 04-03-2009, 11:34 PM
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take the seat off and get volt readings at the battery when the engine is idle and then as you rev the engine up to about 5000rpm. if you're getting readings around 12.5v or so when the engine is at 5000rpm, there's something up with the charging system most likely. check out the vulcan verses for a fault finding diagram at electrosport.com... it's a flow chart which will help you track down the issue. you'll be taking further readings at the r/r and then also at the three wires coming off of the stator.

best wishes that it's something simple.

paul
1991 vn750: 'for great justice'
http://www.globalrecon.org
follow my rides on twitter: http://www.twitter.com/globalrecon

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post #7 of 9 (permalink) Old 04-04-2009, 09:41 PM Thread Starter
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i dont a voltmeter yet but i jumped it off from a jumper pack and it was fine until i pulled the jumper off then the lights dimmed and it ran for a few minutes

2005 VN750
16,000 Miles

HAVE:
V-Force Windshield
V&H Cruzer Pipes
Luggage Rack
Lo-Jack
Intact Toolbox
Avon Venom Tires
Tour Master Cruiser II Slant Bags
K&N Air Filter
Custom Grill



NEED(want)
Engine Guard
16" Ape Hangers
Forward Controls
New Grips
New Mirrors
Driver Backrest
Passenger Backrest
BlackOctober750 is offline  
post #8 of 9 (permalink) Old 04-04-2009, 10:17 PM
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It is possible that even though the battery is new, it could be bad. If the simple things (cleaning grounds) don't help, have the battery load tested.
You wouldn't be the first who got a brand new, yet bad, battery.


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


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

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post #9 of 9 (permalink) Old 04-04-2009, 11:30 PM
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Quote:
Originally Posted by hyperbuzzin View Post
It is possible that even though the battery is new, it could be bad. If the simple things (cleaning grounds) don't help, have the battery load tested.
You wouldn't be the first who got a brand new, yet bad, battery.
+1.

And ditto.

And after you do the volt test 93VN suggested, post the results.
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