Stator Life - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 16 (permalink) Old 10-25-2010, 12:03 AM Thread Starter
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Stator Life

It seems the stators on these bikes have a bad habit of failing...

It seems that a lot of people seem to have about 20k miles on their bikes when the stators go out... Is that a good estimate of stator life, or is it more of an age thing... or a combination of both.

Anybody have an older bike with a lot of miles still going strong on the original stator?

It seems like Kawasaki would have remedied the stator issues -sometime- in their 22 year production run!

Thanks!
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post #2 of 16 (permalink) Old 10-25-2010, 12:27 AM
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There are things you can do to prolong stator life, like re-locating the regulator or de-goating, and keeping up with battery maintenance. I am hoping to be spared the stator replacing experience, but plenty of others have been through it and lived to tell the story. Just one of those things. Every bike has some PITA aspect to it and on this one it's the stators and ACCTs. With other bikes it's chains, belts, valves, transmissions, oil pumps, etc.

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post #3 of 16 (permalink) Old 10-25-2010, 09:29 AM
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My 93' had 30k on it before having to replace the stator. It was partly my fault due to running a junk battery and over working the charging system and not knowing what to maintain on the bike. So basically as with any vehicle/bike it is all in the maintainence.

01' VN750
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post #4 of 16 (permalink) Old 10-25-2010, 10:49 AM
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I don't believe the stator on these bikes is any worse, or better than, other bike stators. What makes it a PITA is having to pull the engine to replace it. Most bikes are designed so the stator can be more easily replaced.

I'm keepin' all the left over parts. I'm gonna use 'em to build another bike!
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Currently 23,298 miles

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post #5 of 16 (permalink) Old 10-25-2010, 01:06 PM
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I have an 85 VN700... I can't know for sure if the stator is the original one, but everything else seems to have been (until I got my hands on it). And as far as I can tell, it's still working. Bike reads around 25K miles, but the speedo didn't work when I got it (still doesn't) so who knows how many miles are truly on it.

I have an 87 EX500 (Ninja) and it's a LOT easier to get to the stator on that one. Just take off the cover and it's right there. No need to remove or move the engine at all.
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post #6 of 16 (permalink) Old 10-25-2010, 05:35 PM
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First off , there is no proof that relocating the R/R will save your stator.

Secondly, it has been seen that keeping the bike's oil level at the very top of the sight-glass seems to be a factor in longer stator life...

Bikes before 1990 seem to have had better stators in them, as witnessed by high mileage bikes still with the original stator...(again no guarenty the stator won't still fail)

As mentioned, the real issue is the PIA it is to replace them on the Vulcan. I have seen many reports of failed stators on other bike forums, so it is not just a problem with the Vulcan...it does effect other brands and models.


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post #7 of 16 (permalink) Old 10-25-2010, 07:08 PM
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X2 to KM`s direction to keep the oil level topped up.

IMHO, the next thing to do to to prolong stator, r/r and battery life is to install a voltmeter to monitor the charging system while riding.

Second, the stator is not designed to charge a very deeply discharged battery, (on a bike from perhaps as high as 11 or 11.5 volts) like an alternator on a car will do. It is designed to keep a battery charged and provide power to run the electrical system while the engine is running. If your battery discharges between rides, you need to put it on a charger or battery tender to bring it back to full charge before riding again. A MF-AGM battery may prolong stator life too. Combined with NGK Iridium spark plugs, it will definitely make starting the bike easier both cold or hot.

Third, make sure all electrical connections are clean, tight and sealed with dielectric grease to prevent future corrosion.

Gordon

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

H-D windshield
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Last edited by OlHossCanada; 10-25-2010 at 07:10 PM.
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post #8 of 16 (permalink) Old 10-25-2010, 09:31 PM
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Quote:
Originally Posted by Knifemaker View Post
First off , there is no proof that relocating the R/R will save your stator.

Secondly, it has been seen that keeping the bike's oil level at the very top of the sight-glass seems to be a factor in longer stator life...

Bikes before 1990 seem to have had better stators in them, as witnessed by high mileage bikes still with the original stator...(again no guarenty the stator won't still fail)

As mentioned, the real issue is the PIA it is to replace them on the Vulcan. I have seen many reports of failed stators on other bike forums, so it is not just a problem with the Vulcan...it does effect other brands and models.


KM
I stand corrected and I humbly bow before the greatness of Knifemaker and the other master mechanics on this forum. This is actually good news!

'03 VN750 "Rosie"
Purchased in June 15, 2010
Windshield
Lubed Splines
Lubed and Adjusted Clutch Cable, Throttle Cables.
Relocated Voltage Regulator
Brakes Bled
Luggage Rack
Lazy Rider Bag
Leather Saddle Bags
Legitimate Title!! (finally!) Aug 30, 2010
New AGM Interstate Battery Sept 15, 2012

2008 Hyosung GV250 (sold!)
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post #9 of 16 (permalink) Old 11-07-2010, 10:14 AM
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Quote:
Originally Posted by Knifemaker View Post
Secondly, it has been seen that keeping the bike's oil level at the very top of the sight-glass seems to be a factor in longer stator life...
How does your oil level have anything to do with an electrical issue??
Not trying to be a smartass, just wondering.

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post #10 of 16 (permalink) Old 11-07-2010, 10:48 AM
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Resistance is Futile...

Quote:
Originally Posted by SoCalVulcan View Post
How does your oil level have anything to do with an electrical issue??
Not trying to be a smartass, just wondering.
Oil, as in any small engine, is a part of the cooling process. The cooler the oil, especially with aluminum engines, the longer the life. Stators in jap bikes run in oil so keep that oil cool, and topped off. I run, not to the liking of some here, a full 4L of 20-50 vTwin rated (marketed) oil to give my original 95 stator every bit of grace I can give.

Resistance is Futile... The three wires that exit from the stator and connect near the battery box have been, and always will be a problem unless modded. They, in my opinion, are one of the issues with stator failure. The connectors get weathered , corroded, overheated, the wire gauge is too small and is not high temp rated (or needs to be better quality). Clean the connectors, pack with dielectric grease (a good quality clear synthetic grease works really well), and put them in a wire loom for more protection.

Kawasaki quality control may have the biggest impact on stator life above all. If they fudged on the splines & grease, they could have used crappy magnet wire with inferior enamel coatings causing premature failure.

DT

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