Voltmeter showing close to 16v @ 4000rpm - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 8 (permalink) Old 05-21-2011, 04:00 PM Thread Starter
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Voltmeter showing close to 16v @ 4000rpm

Hi to all,

I recently connected a voltmeter to my bike which has a Yuasa Maintenance Free battery. Its showing round 12.3 volts with ignition on, round 14 volts at idle and goes up to round 15.6 volts at around 4000 rpm. Is this normal or does this smell like trouble?

Cheers, Alan

Last edited by malteser66; 05-21-2011 at 05:37 PM.
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post #2 of 8 (permalink) Old 05-21-2011, 06:36 PM
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Did you check the voltage at the battery in this test ? It really should not be that high at 4000 RPM. Clean up your connentions on the yellow wires coming from the stater and then the connection to the RR and then see what it reads. The RR maybe trying to over charge the battery, they do this when they start to go out.

2004 25,500 miles
Led tail light enhancement
Homemade floor boards
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Fused Stator
Mcct conversion-cost 4.50
Ride-on in tires
crash bar with home made hyway pegs
iridium plugs
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coil pickups adjusted.
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post #3 of 8 (permalink) Old 05-21-2011, 07:38 PM Thread Starter
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Hi WEH44ATT,
Lately I had the stator cover removed and a new sealant gasket was applied by my mechanic as it was dripping oil. Could it be that during this fix something was misplaced? Which connections and yellow wires are you talking about, could you please specify..... also note that I removed all the wire plugs connections to the R/R and soldered all the wires appropriately and used shrinking pipes etc.
Thanks, AL
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post #4 of 8 (permalink) Old 05-21-2011, 07:42 PM Thread Starter
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yes voltage mentioned is from battery...
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post #5 of 8 (permalink) Old 05-21-2011, 07:56 PM
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Quote:
Originally Posted by malteser66 View Post
Hi WEH44ATT,
Lately I had the stator cover removed and a new sealant gasket was applied by my mechanic as it was dripping oil. Could it be that during this fix something was misplaced? Which connections and yellow wires are you talking about, could you please specify..... also note that I removed all the wire plugs connections to the R/R and soldered all the wires appropriately and used shrinking pipes etc.
Thanks, AL
Sounds like you already soldered and shrink wrapped the wires where the "bullet" connectors were used on the three yellow wires from the stator to the r/r.

Disconnect the 6 pin connector from the r/r and clean contacts with plastic safe electronic contact spray cleaner. Seal with dielectric grease when you reassemble.

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 #6 of 8 (permalink) Old 05-21-2011, 08:09 PM Thread Starter
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Yes I did remove all the bullet plugs, also my R/R has no 6 pin connector as its an aftermarket R/R, I think its an electrex model, its bigger than OEM and the wires go directly into it without any connector. Could it be from the stator side or its just coincidence that maybe the R/R is showing the first signs of failure just after the mentioned fix. I`m pretty stressed about this as I had booked a one week bike trip in Sicily coming month and for sure I don`t want to be left stranded on the road there..... hmmmm
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post #7 of 8 (permalink) Old 05-21-2011, 10:52 PM
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Soory I did not get back to you Maltesler, had to go to a little kids baseball game. As OHass said looks like you have all leads soldered and sealed. See if you can check the voltage coming out of the RR as the bike is running.The RR regulates the amount of voltage that goes to the battery, seems that it is trying to over charge the battery. I had something about the same thing happening but mine was a bad soldered connection and the regulator was trying to compensate.

2004 25,500 miles
Led tail light enhancement
Homemade floor boards
Headlight modulator
Extra heat sink on R+R
R+R relocation
Homemade driver's backrest
Fused Stator
Mcct conversion-cost 4.50
Ride-on in tires
crash bar with home made hyway pegs
iridium plugs
home made fork wind deflectors
coil pickups adjusted.
Kenda kruz tires 110/90 170/80
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post #8 of 8 (permalink) Old 05-22-2011, 02:17 AM Thread Starter
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Not to worry, I have to check deeper into this...and get back to you guys, maybe I should drive the bike a bit more and re-check the values ....I have just finished from my 12hr night shift and rode back home in rain bike is all muddy now, needs a good wash and I need some good sleep.
Cheers, Al
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