Topic: 74' Cb350f won't charge - Stator problems? (with video)

[EmilCb350f]

Hey guys, it's on again.
Now it's Me vs. my charging system.

My CB350F won't charge at all. It dies when my headlight has used up all the juice from the battery, and I have to charge it again.
Because of this, I've stranded the most annoying places, not even able to kick or even push it to start.
I Should mention that the root to this problem probably was that two of the yellow wires gt exposed, and touched eachother and/or the frame while running.
When I opened my seat pan, the my ballistic 8cell lithium battery was totally fried. At this point, I could push it to a start, and it ran fine.
I drove to a mechanic, where we together isolated the 3 yellow wires from the stator til my aftermaket Regulator/rectifier.
He didn't do any readings on the stator, but said it looked fine - then turned to the Regulator/rectifier and said that it probably was the culprit, because the battery was melted.
We suspected that the stator had fried it, and caused it to overcharge the battery.
I bought a new battery (same as before), then drove home, and ordered a new Regulator/rectifier.

When I test my "old" Regulator/rectifier the readings seems fine, as on the new one.
It reads  0.576 ohms on all the 3 yellow leads, and is very consistent.

I've measured the leads on the stator as well, and posted a video whilst, see it here:

https://www.youtube.com/watch?v=DMJpb9sBWrs

If I really need a new stator, do any of you know where to get one that is affordable, or do you have one?
(I need it shipped to Denmark)

Hope you can help getting me running again, so I get my long lost streedcred back again
I actually stalled with a lady on the back!! Allmost lost my dignity there..

[strynboen]

brat bikes are not suposed to have a loading system...they are only for looks...

edit video are now on..see that one stator vinding are broken/diskonnekt...it can be broken vires..or bad konneksion...

thek your stator viring..the 3 yellow vires...most have the same ohm messuring between the  yellow vires..so take the multimeter..and take messumerents betveen the virers (2 at time.).from 1 to 2..and 2to3 amd 3 to 1.. the ohm must be 0,61-0,69 ohm after my haynes book
the elektromagenet/stator magenet must be ca 4,9-5,0 ohm..hvise /gryn kabel -hvite green kabel from stator housing.

.all readings are for 400 four...so can not garentee it fit for 350 four

its easy to find a old stator in denmark..or get the old remaked...langelands elektro make a komplet revinding islation laukqeing..think it kosts ca 1500 kr

[EmilCb350f]

Tak strynboen - lækkert med en Dansker  (he's danish aswell sorry)
Have you seen the video I uploaded, already did that. Check it out.

[strynboen]

please sent the stator to langelands elektro...and i vill thek it for free.

.there are some possibel repairs metods..but i need to have it in my hands to..take the yellov viring off inside the vinding to thek vitaut old vires to komplikate..

it vill only kost the fraight for you..and i send it back...after inspektion..if you not vill have it renovated..its a bit kosty...so a used are a good alternative..
but it have also to be kontroled..and eventely put nev yellov viring..then it often are cracked of oil and heat

the one at photo are not revindet..but only re vired..and lauqered..

[EmilCb350f]

Thank you so mutch!
I really would like to send it to you, if you want to look at it.
We could arrange over the phone?
My danish number is: 31775776

Look forward to hearing from you./ Vi tales ved 

[TwoTired]

Note that your meter is set on the 200 ohm scale.  Measuring less than 1 ohm on that scale is quite a lot to ask, as 1 ohm is .5 % of full scale.  Does your meter manual say it has better accuracy than that?  Digital does NOT mean absolute.  Would you measure a cup of liquid using a 50 gallon drum?

Also, you are measuring the resistance of a wire in the stator.  Which is also what your meter leads are made of.  When you simply place the probe tips together, you will still get a resistance reading.  This reading is part of the error introduced by your meter and you must subtract it from any reading you make on a device under test.  .4 or .5 ohms is common for meter leads and connections.

Having said that, there must be some continuity between each of the yellow for the stator to function.  If you can't get it at the connector, you have to probe closer to the actual winding to prove one of them is open circuit, and not some problem with the interconnect wiring.

These stators are self limiting in current output, and they cannot generate enough power to melt their own windings via a shorted output.  Some other issue must befall them to make them open in continuity.

 In short, get your probe tips as close to the actual stator windings as you can.  Once you see resistance, subtract out the meter error, or get a meter with a 20 ohm or lower resistance scale.

[strynboen]

yes it must be battery power vho melts the vire..often it happends vhem the battery polarity are reversed...or the retifier are mounted backverd or shorted...
but the problems in regulating the volts/effekt..grovs bigger then smaller battery there are mounted...a 12 ah can take a lot of"overload" vitaut to melt..a 4 ah blows up..if the reguklating not are perfekt adjusted..the stock" load" adjuster...its not a volt regulator..and a bit rouof for small capasity batteries

to run this small batterys...a volt regulator from a car..or a generator vho regulats vith a elektro magenet. can be used. there are more types bosch make one vho can be build inn..to hold the volt at 14.8 volt

search for the tread..think dave 500 have a bosch regulator on his 500..

[dave500]

any of the small four stators will fit the case,you just have to re solder the direction the tail wires come out.

[MickB]

Elegant  solution in its simplicity.

For me to get my old one rewound in Geelong (best re winders in Australia) quote was Aud$440 = k3000+ krone.

Bought 2nd hand $50 + postage = simple solution

[EmilCb350f]

Thank you so much guys.
You are the reason this forum is invaluable.
I re wired the three yellow wires from the stator, and got them isolated proberly and cleaned the connectors.
I did this because - The resistance measurements at the far end of the stator was 0.9 ohm on all three connectors (as you suggested).
So the stator was fortunatley fine.
But thank you so much for your gesture strynbo, I appreciate it very much.

As the the Rugulator/Rectifier had good readings I figured it must be the wiring.
True enough, when I opened the harness from the Rectifier I saw that the green groundwire had almost corroded away at one point.
I replaced all the wires from the RR to the battery and frame and got it all isolated proberly - yeah I know, this was the first thing I should have done when rewiring my harness when I started my project.

It charges like a charm now (13.0-.13.9 volts) .Too bad the season in Denmark ends today, but at least I got it running perfectly for the last few weeks.

I got my reearned my streedcred and the ladies got their promised rides (without stalling) again.

Thank you SOHC4

[strynboen]

good to hear..it all runs. thgange the vires ,,vas exat the point .have put 2 of mine bikes inn for winter...but keep the cbx 1000 on road..hope to get a fev good trips before vinter sets inn

hope we be seen on the danish roads...håber vi ses på vejen...