Bike battery dies. Is it my VR?

mjsk9

Well-Known Member
The only problem with just a stator is if it's the original you can't get a replacement. Company doesn't exist and the stator and rotor combo have to be a match set otherwise it won't work.

To save having to go back in there I would replace both and not have to touch it again for 10+ years. I would also just put in a new VR since it's right there and if you don't know when or if it's ever been replaced it's only an extra $50 to buy a full kit rather than pay a little more to piece it together down the road later, save time now and piece of mind.

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Great advice Eric! I know for me personally, I would rather outlay the small amount of extra cash to do the right fix up front rather than applying a band aid have to worry about it going south in the future! Worth the piece of mind for sure!
 

Stack

Member
Yes, sounds like it's the stator is not equal in output so it's bad for sure. The VR is okay because it showed it can calc 12v at the meter, not spike anything over that. So stator only is the replacement piece. Rotor should be fine. Only your volt meter knows for sure across the battery posts once all back together.
Does this look correct for my 2007?
 

Mikeinjersey

Well-Known Member
I found the button did not seem push out. I push it in but seem like it was not out. I checked the stator one I ground to motor and the to one from the plug it said 21 check the other read 26.
Follow the diagnostic chart I sent you. With the stator unplugged and the engine running @ 1000 rpm what is your reading? If it's between 16 and 20 vac the chart says go for the VR.
 

woodbutcher

Mr. Old Fart member #145
Staff member
Does this look correct for my 2007?
Curtis is a good guy and source. both wildsteedworx and HDM/bigdogpartsking are your go to places for big dog parts.
 

Jersey Big Mike

100K mile club
I found the button did not seem push out. I push it in but seem like it was not out. I checked the stator one I ground to motor and the to one from the plug it said 21 check the other read 26.
The only problem with just a stator is if it's the original you can't get a replacement. Company doesn't exist and the stator and rotor combo have to be a match set otherwise it won't work.

To save having to go back in there I would replace both and not have to touch it again for 10+ years. I would also just put in a new VR since it's right there and if you don't know when or if it's ever been replaced it's only an extra $50 to buy a full kit rather than pay a little more to piece it together down the road later, save time now and piece of mind.

Sent from my Pixel 3a using Tapatalk
You should be measuring between the two wires that come out of the stator and reading an AC VOLTAGE (IMPORTANT)
It should also increase if you rev up the motor to 2500-3000 RPM.
Measuring stator out to ground of bike is not a proper test.
With bike off, vr disconnected from stator you do want to measure stator wires to ground resistance to check for a short on the stator to ground .

If you do need to replace it, I would do both stator/rotor and VR. I personally prefer the Compufire line and use the overkill 40A 3 phase system. I personally find it to be one of the best upgrades I've done to my bike (and provides ALL the extra power you'll need for extra accessories when riding).
 

Stack

Member
Just an update on what I did. Order a stator and VR kit compufire 32 amp from wild steel worx. Did it myself, was not to bad. When I was taking things apart I seen the back of my VR look like it burn a hole on the back. Stator look good but change it out anyways. Put it all back together change the oil and it runs like a champ. 13V before start and 14V running. Now it’s going to the shop for new tires and air ride. Love this bike!!
D2DB0D36-8527-4685-878F-DD636DCC5340.jpeg
 

Mickmorris

Well Known Member
Supporting Member
That’s awesome update! I bet you are happy to have done it yourself. Makes me feel good just to work on my bike.
 

Chong

U-238
Just had a charging issue,

For other peeps reference.

Stator plug at front of primary was making intermittent/poor contact.

Fixed my problem based on volt meter readings.

I don't know if VR is case grounded but also cleaned mounting points and added two star washers .

I will say cleaning that plug and putting a little pinch on the male plug contacts is what did the trick.
 
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