Stator Check-Out

[joker9r]

Found a good write-up for checking your charging system and stator so I thought I'd post it.

Place a multi meter on the battery terminals and check for battery voltage, it should be around 12.5V.

2
Turn the key on and check battery voltage again. It should not have dropped more than .5V

3
Push the starter button while keeping an eye on the multimeter, it should not drop past 11.5V

4
Bring RPMs up to around 3000-3500, battery voltage should be between 13.5 and 14.5V. If voltage the rises and battery fails one of the first 3 tests, the battery is bad. If the voltage doesn't rise, or rises slightly, it could be the regulator/rectifier, or the stator that has given up the ghost.

5
Ok, so the battery is good, now to figure out if the regulator/rectifier or the stator has failed:
Unplug the stator leads from the reg/rec. There should be 3 wires, usually yellow or white.

6
Set multimeter on resistance scale(ohms Ω). Test resistance between each of the three wires coming off of the stator. 1-2, 2-3, 3-1. Resistance should be present, it will vary depending on type of stator. If there is no resistance between any two leads, the stator is bad.

7
Test the resistance of each wire to ground(any available motor bolt will do). There should be no resistance, you should get the infinity symbol (∞), or OL depending on the multimeter. If there is resistance between any lead and ground, stator is bad.

8
Set the multimeter to volts AC. Start motorcycle and check voltage between each of the three leads coming off the stator at 3000RPM. The AC voltage should be between 75 and 150 volts AC.

9
If the stator passes all tests, the regulator is bad.

 

[Bubba B]

You must be a mind reader. I was comming to look this up to check mine.Thanks:2thumbs:

 

[joker9r]

You must be a mind reader. I was comming to look this up to check mine.Thanks:2thumbs:

Awsome! glad to help

 

[joker9r]

Another quick way to check out the stator is to disconnect the VR from the stator connector socket......

continuity between the stator connector pin and engine case = Bad

check the resistance through the stator through the 2 pin stator socket. 0.2 - 0.6 should be about normal.

there should be continuity between the 2 pin sockets at the stator connector.

 

[Raywood]

Making this a sticky. Great post

 

[PurpleDog]

Recommend the A/C volt check; I measured 0.00 ohms across the 2 pins (closed) on both bikes; K9 was putting out no A/C volts at the stator whereas the Coyote is.

 

[spark]

Shouldn't 7 read; Test the resistance of each wire to ground(any available motor bolt will do). There should be maximum resistance, you should get the infinity symbol (∞), or OL depending on the multimeter. If there is low (1Megohm or less)resistance between any lead and ground, stator is bad.
???

 

[joker9r]

Shouldn't 7 read; Test the resistance of each wire to ground(any available motor bolt will do). There should be maximum resistance, you should get the infinity symbol (∞), or OL depending on the multimeter. If there is low (1Megohm or less)resistance between any lead and ground, stator is bad.
???

Good catch... Yes when checking for the short to ground.. infinate or high resistance would indicate shorting to ground. :2thumbs:

 

[DRBarnhart]

For the sake of accuracy and clarity I'd like to make a couple of suggestions here:

6
Set multimeter on resistance scale(ohms Ω). Test resistance between each of the three wires coming off of the stator. 1-2, 2-3, 3-1. Resistance should be present, it will vary depending on type of stator. If there is no resistance between any two leads, the stator is bad.

Instead of saying "Resistance should be present" it should say a low resistance value should be present... (more than .2 ohms but most likely less than .4 ohms)

7
Test the resistance of each wire to ground(any available motor bolt will do). There should be no resistance, you should get the infinity symbol (∞), or OL depending on the multimeter. If there is resistance between any lead and ground, stator is bad.

And in this step it shouldn't say "There should be no resistance" (which means a dead short) it should say that you should measure an "open" or "infinite" resistance (like you see on your meter when the leads are held out in the air not touching anything or each other).

9
If the stator passes all tests, the regulator is bad.

While that may be true there's a little more testing you can do before you lay down the cheese. Check out tip #4 & #5 here...

http://www.bigdogbiker.com/forums/technical/11183-night-trains-tech-tip-week.html

Dennis

 

[Oscar Maldonado]

Ole' Night Train - He did have some imput, didn't he.

 

[joker9r]

Nice! Great clarification.... Thanks for the inputs... This is why the tech section of this forum is GREAT!

 

[Chopper K-9]

Starter

Can any one Please!!! help me??? My starter will click the soleniod but the starter will not spin. I took off the soleniod cover and pushed the plunger and it turned the motor just fine. Cleaned the contacts,cleaned it with electrical cleaner and put it back together and it does the same thing. PS It has been a (((Long))) Gray winter, And now the sun is out in Utah and I would like to ride. THANKS!!!
Chopper K-9

 

[Dawgboy]

Found a good write-up for checking your charging system and stator so I thought I'd post it.

Place a multi meter on the battery terminals and check for battery voltage, it should be around 12.5V.

2
Turn the key on and check battery voltage again. It should not have dropped more than .5V

3
Push the starter button while keeping an eye on the multimeter, it should not drop past 11.5V

4
Bring RPMs up to around 3000-3500, battery voltage should be between 13.5 and 14.5V. If voltage the rises and battery fails one of the first 3 tests, the battery is bad. If the voltage doesn't rise, or rises slightly, it could be the regulator/rectifier, or the stator that has given up the ghost.

5
Ok, so the battery is good, now to figure out if the regulator/rectifier or the stator has failed:
Unplug the stator leads from the reg/rec. There should be 3 wires, usually yellow or white.

6
Set multimeter on resistance scale(ohms Ω). Test resistance between each of the three wires coming off of the stator. 1-2, 2-3, 3-1. Resistance should be present, it will vary depending on type of stator. If there is no resistance between any two leads, the stator is bad.

7
Test the resistance of each wire to ground(any available motor bolt will do). There should be no resistance, you should get the infinity symbol (∞), or OL depending on the multimeter. If there is resistance between any lead and ground, stator is bad.


8


Set the multimeter to volts AC. Start motorcycle and check voltage between each of the three leads coming off the stator at 3000RPM. The AC voltage should be between 75 and 150 volts AC.

9
If the stator passes all tests, the regulator is bad.

Great post, thanks

 

[DizzyD]

help

Where are these three wires from the stator that need to be checked, call me a rookie but I can't seem to find them. Do I need to remove the primary cover?