new rectifier, relatively new battery, not charging

[H-2 CHARLIE]

   TEST... START THE BIKE WITHOUT THE STATER PLUGGED INTO THE rectifier and measure AC voltage between each wire . You should have 16-18 AC volts per 1000 rpms so at idle you should see 16-20 volts at 3000 rpms three times that voltage . The maxaum output of the stator would be the wattage of your system divided by four. A current system output will be 520/4=130  AC volts  .when testing ,increase the rpm of the motor the stator output will stop increasing well before redline . The max output should be 130 volts if it tests bad replace the stator .

[Privateer]

  TEST... START THE BIKE WITHOUT THE STATER PLUGGED INTO THE rectifier and measure AC voltage between each wire . You should have 16-18 AC volts per 1000 rpms so at idle you should see 16-20 volts at 3000 rpms three times that voltage . The maxaum output of the stator would be the wattage of your system divided by four. A current system output will be 520/4=130  AC volts  .when testing ,increase the rpm of the motor the stator output will stop increasing well before redline . The max output should be 130 volts if it tests bad replace the stator .

thanks.

following this I only 18v AC at 2k  not sure what I was measuring before that indicated the stator was OK.  At 3k the most I got from one phase was 30v. 

so seems to be the stator at this point. 

[H-2 CHARLIE]

Well rip it out of there and send it off to Ricks Motorsports electrics inc.,when they recieved it they called and said they had one on the shelf ready to go . $120-140 ..they tested my R/R for free and said it was fine ,nice guys .use motul   full syn oil so it wont fry the stator as easy as semi oil .

[Privateer]

Well rip it out of there and send it off to Ricks Motorsports electrics inc.,when they recieved it they called and said they had one on the shelf ready to go . $120-140 ..they tested my R/R for free and said it was fine ,nice guys .use motul   full syn oil so it wont fry the stator as easy as semi oil .

I looked online at Ricks and all I saw were new stators.  If I send the a suspect one, will they check it first?  I didn't see where that service was offered.

thanks.

[H-2 CHARLIE]

call them .... you might see your stator looking like mine with burnt chared oil crust caked on there .ask them to test the R/R they told me $10 for the test  but did not charge me for that just for the rebuilt one they sent me .

[He Man]

this thread is proving very helpful, since i am trouble shooting the exact same problem.

i removed the stator plug and tested all 3 wires. They are in AC so i just  put my tester between each wire correct? I got my 50 volts at ~5,000rpm ( i dont have a tach, but im just using my ear from comparing to another ducati monster). but according to the electrosport fault finding guide, i should still be questioning the stator since the resistance is lower than 3ohms or higher than 3 ohms...

so who do i believe?

[suzyj]

The three wires are connected in a delta in the stator, so by testing the AC voltage between each combination of wires you test each of the three windings.

What's the resistance you're measuring, and how are you measuring it?

[He Man]

it was .2ohms, i measured it as the flow chart told me to. 1 lead (black) to the + on battery and 1 lead (red) to the regulators output (white/red wire).

The regulator has 2 grounds (2 green) and 2 positive (red/white).

[suzyj]

0.2 Ohms on that connection is acceptable.

I thought you were measuring the resistance of your stator.  You do that by putting your multimeter into ohms mode, disconnecting the cable to the stator, and measuring the resistance between each combination of yellow wires back to the stator.

Also test the resistance from each of the yellow wires to ground - this should be high.

[He Man]

i was measuring resistance between the RR output not the stator output, ill go back and test stator side.

just for curiosity sake, high resistance between stator and ground means what?

what reading should i get if i measure the ohms between each of the stators yellow wires?

assuming that is good, then i should point my finger at the RR?

[drunkfatguy]

I'm just reading along here, very Interesting topic also. He man, are you on the 2nd page that goes and asks you to do the resistance check between the 2 other wires other than the 3 yellow(or white=Yamaha), the block then has the arrow to the right that says "you have a reading lower than 3 ohms or higher than 10"? That's the Rotor/Armature resistance check right? I'm just trying to follow along as this is kinda Interesting.

this thread is proving very helpful, since i am trouble shooting the exact same problem.

i removed the stator plug and tested all 3 wires. They are in AC so i just  put my tester between each wire correct? I got my 50 volts at ~5,000rpm ( i dont have a tach, but im just using my ear from comparing to another ducati monster). but according to the electrosport fault finding guide, i should still be questioning the stator since the resistance is lower than 3ohms or higher than 3 ohms...

so who do i believe?

[drunkfatguy]

Ok I'm caught up, back to reading.

[suzyj]

just for curiosity sake, high resistance between stator and ground means what?

High resistance between the stator wires and ground means the stator windings aren't shorted out to ground.  If the stator gets really hot, the insulation can degrade on the coils.  Sometimes this results in really low resistance between stator wires, other times a low resistance between stator wire and ground.  Either is bad.

what reading should i get if i measure the ohms between each of the stators yellow wires?

Something like an ohm.  If it's really low, like 0.2 ohms, it means the stator insulation is shot.  If it's high (like 3 ohms) then one of the coils is open circuit.

Each of the measurements should be approximately the same, too.  Actually this is more important than the actual resistance.

assuming that is good, then i should point my finger at the RR?

You should also check the wiring resistance between the ground output of the RR and the ground at the battery (should be < 0.2 ohms) and the resistance of each of the three yellow wires from the stator output to the RR input (< 0.2 ohms), as well as AC volts on the stator windings while running the bike (50 odd V).

But yeah, if these checks work but you're not getting volts out of the RR, then the RR is shot.

[Privateer]

 You do that by putting your multimeter into ohms mode, disconnecting the cable to the stator, and measuring the resistance between each combination of yellow wires back to the stator.

engine running or off?

[Speeddog]

engine running or off?

Engine off.